To crimp or not

Justinl604 · Nov 4, 2019

Reloading .308 win

168 grain match bullets. Do I crimp or not as I've heard conflicting information that bullets without crimp lines are not supposed to be crimped.

I'm happy with what I have been doing . So far I crimp and have had no issues.

Currently trimming case to . 2010 \ 40.1 gn of 4320 \ O.A.L of . 2800 with 168 grain match

350 Mag · Nov 4, 2019

Semi auto = crimp

Bolt. No

IvoB · Nov 4, 2019

350 Mag said:
Semi auto = crimp

Bolt. No

^^^^this^^^^

Justinl604 · Nov 4, 2019

Great. Thanks for the input update if I see an improvement

just having some fun · Nov 4, 2019

Crimp if it is a tube type mag

Bolt = No crimp

Semi = no, but it depends on the bullet and or the tension on the bullet from the case
if I could load more than 5 in a mag ???????

Some of the big cals, with the big heavy bullets 250- 300- 400 g = Crimp = where recoil can pull bullets out of a case Yes

Cast bullets in a Semi = Yes

Leatherstocking · Nov 4, 2019

You could try a Lee Factory Crimp die
I use one for Barnes TSX & TTSX
In my experience recoil tends to pull bullets out of the case, simple physics.

350 Mag · Nov 4, 2019

For a semi-auto hunting rifle, like FNAR or RFB 308.

I found without a crimp(Lee FCD) bullet setback could occur when chambering a round repeatably.

Lee FCD will not deform bullet nor will it hurt accuracy.

trapoholic · Nov 5, 2019

I use the lee factory crimp like Frank's red hot sauce. I put that #### on everything!

leeelmer · Nov 5, 2019

I have Lee Factory Crimp dies for all my calibers, I use them for everything, I have had Lee build custom ones for me as well for ones that are not in there catalogue.
I have found they are fantastic.

trapoholic · Nov 5, 2019

leeelmer said:
I have Lee Factory Crimp dies for all my calibers, I use them for everything, I have had Lee build custom ones for me as well for ones that are not in there catalogue.
I have found they are fantastic.

You know what's up my friend!

9.3mauser · Nov 5, 2019

I would not crimp a match bullet. There's really no need to if your neck tension is correct.

444shooter · Nov 5, 2019

trapoholic said:
I use the lee factory crimp like Frank's red hot sauce. I put that #### on everything!

A must have for semi or lever.

unlisted.handle · Nov 5, 2019

I reloaded to Match Grade Standards .308 for use in my Match Grade LRB M14S.
I used Sierra Match King 168 grain HPBT that did not have a cannelure groove on the bullet, and crimping was not an option.
If any other bullet I reloaded for had a cannelure groove, I would crimp it.

trapoholic · Nov 5, 2019

444shooter said:
A must have for semi or lever.

Absolutely, I reload for pumps and a blr. But reloading for semis has me thinking of starting a thread right meow. Keep a eye out!

todbartell · Nov 5, 2019

I use a Lee Factory Crimp Die in almost every cartridge I load for. If I don't have one, it's because they don't make it yet. I find it tames velocity variances. At worst it doesn't hurt

silverfoxdj · Nov 5, 2019

tagged..good info

todbartell · Nov 5, 2019

Radar data from a Tikka t3X 223 with identical handloads.

No crimp :

Code:

[TABLE="width: 1088"]
[TR]
[TD]Stats - Average[/TD]
[TD="align: right"]3022.93[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Stats - Highest[/TD]
[TD="align: right"]3091.42[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Stats - Lowest[/TD]
[TD="align: right"]2953.56[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Stats - Ext. Spread[/TD]
[TD="align: right"]137.86[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Stats - Std. Dev[/TD]
[TD="align: right"]37.52[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Shot ID[/TD]
[TD]V0[/TD]
[TD]V25[/TD]
[TD]V50[/TD]
[TD]V75[/TD]
[TD]V100[/TD]
[TD]V150[/TD]
[TD]Ke0[/TD]
[TD]Ke25[/TD]
[TD]Ke50[/TD]
[TD]Ke75[/TD]
[TD]Ke100[/TD]
[TD]Ke150[/TD]
[TD]PF25[/TD]
[TD]Proj. Weight[/TD]
[TD]Date[/TD]
[TD]Time[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]3045[/TD]
[TD="align: right"]2968[/TD]
[TD="align: right"]2891[/TD]
[TD="align: right"]2812[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1235[/TD]
[TD="align: right"]1173[/TD]
[TD="align: right"]1113[/TD]
[TD="align: right"]1053[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]178.08[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:11:04[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]3004[/TD]
[TD="align: right"]2929[/TD]
[TD="align: right"]2851[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1202[/TD]
[TD="align: right"]1143[/TD]
[TD="align: right"]1082[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]175.74[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:11:33[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]3019[/TD]
[TD="align: right"]2944[/TD]
[TD="align: right"]2866[/TD]
[TD="align: right"]2788[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1214[/TD]
[TD="align: right"]1154[/TD]
[TD="align: right"]1094[/TD]
[TD="align: right"]1035[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]176.64[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:14:42[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]3076[/TD]
[TD="align: right"]2998[/TD]
[TD="align: right"]2920[/TD]
[TD="align: right"]2843[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1260[/TD]
[TD="align: right"]1197[/TD]
[TD="align: right"]1135[/TD]
[TD="align: right"]1076[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]179.88[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:16:14[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]3054[/TD]
[TD="align: right"]2977[/TD]
[TD="align: right"]2900[/TD]
[TD="align: right"]2821[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1242[/TD]
[TD="align: right"]1180[/TD]
[TD="align: right"]1119[/TD]
[TD="align: right"]1059[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]178.62[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:18:18[/TD]
[/TR]
[TR]
[TD="align: right"]6[/TD]
[TD="align: right"]3091[/TD]
[TD="align: right"]3015[/TD]
[TD="align: right"]2936[/TD]
[TD="align: right"]2857[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1273[/TD]
[TD="align: right"]1210[/TD]
[TD="align: right"]1148[/TD]
[TD="align: right"]1087[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]180.9[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:18:32[/TD]
[/TR]
[TR]
[TD="align: right"]7[/TD]
[TD="align: right"]3009[/TD]
[TD="align: right"]2933[/TD]
[TD="align: right"]2855[/TD]
[TD="align: right"]2776[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1205[/TD]
[TD="align: right"]1145[/TD]
[TD="align: right"]1085[/TD]
[TD="align: right"]1026[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]175.98[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:20:03[/TD]
[/TR]
[TR]
[TD="align: right"]8[/TD]
[TD="align: right"]2954[/TD]
[TD="align: right"]2879[/TD]
[TD="align: right"]2801[/TD]
[TD="align: right"]2718[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1162[/TD]
[TD="align: right"]1104[/TD]
[TD="align: right"]1045[/TD]
[TD="align: right"]984[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]172.74[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:20:20[/TD]
[/TR]
[TR]
[TD="align: right"]9[/TD]
[TD="align: right"]3022[/TD]
[TD="align: right"]2946[/TD]
[TD="align: right"]2868[/TD]
[TD="align: right"]2790[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1216[/TD]
[TD="align: right"]1155[/TD]
[TD="align: right"]1095[/TD]
[TD="align: right"]1037[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]176.76[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:20:41[/TD]
[/TR]
[TR]
[TD="align: right"]10[/TD]
[TD="align: right"]3048[/TD]
[TD="align: right"]2970[/TD]
[TD="align: right"]2893[/TD]
[TD="align: right"]2818[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1237[/TD]
[TD="align: right"]1175[/TD]
[TD="align: right"]1114[/TD]
[TD="align: right"]1058[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]178.2[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:22:31[/TD]
[/TR]
[TR]
[TD="align: right"]11[/TD]
[TD="align: right"]2977[/TD]
[TD="align: right"]2902[/TD]
[TD="align: right"]2826[/TD]
[TD="align: right"]2753[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1180[/TD]
[TD="align: right"]1121[/TD]
[TD="align: right"]1063[/TD]
[TD="align: right"]1009[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]174.12[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:22:50[/TD]
[/TR]
[TR]
[TD="align: right"]12[/TD]
[TD="align: right"]3043[/TD]
[TD="align: right"]2966[/TD]
[TD="align: right"]2889[/TD]
[TD="align: right"]2811[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1233[/TD]
[TD="align: right"]1172[/TD]
[TD="align: right"]1111[/TD]
[TD="align: right"]1052[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]177.96[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:23:12[/TD]
[/TR]
[TR]
[TD="align: right"]13[/TD]
[TD="align: right"]3020[/TD]
[TD="align: right"]2943[/TD]
[TD="align: right"]2865[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1214[/TD]
[TD="align: right"]1153[/TD]
[TD="align: right"]1093[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]176.58[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:44:46[/TD]
[/TR]
[TR]
[TD="align: right"]14[/TD]
[TD="align: right"]3004[/TD]
[TD="align: right"]2927[/TD]
[TD="align: right"]2849[/TD]
[TD="align: right"]2773[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1201[/TD]
[TD="align: right"]1140[/TD]
[TD="align: right"]1081[/TD]
[TD="align: right"]1024[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]175.62[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:45:10[/TD]
[/TR]
[TR]
[TD="align: right"]15[/TD]
[TD="align: right"]2979[/TD]
[TD="align: right"]2904[/TD]
[TD="align: right"]2828[/TD]
[TD="align: right"]2752[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1182[/TD]
[TD="align: right"]1123[/TD]
[TD="align: right"]1064[/TD]
[TD="align: right"]1008[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]174.24[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]11/26/16[/TD]
[TD="align: right"]15:45:37[/TD]
[/TR]
[/TABLE]

Crimped with LEE Factory Crimp Die

Code:

[TABLE="width: 1088"]
[TR]
[TD]Stats - Average[/TD]
[TD="align: right"]3005.42[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Stats - Highest[/TD]
[TD="align: right"]3043.18[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Stats - Lowest[/TD]
[TD="align: right"]2961.23[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Stats - Ext. Spread[/TD]
[TD="align: right"]81.95[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Stats - Std. Dev[/TD]
[TD="align: right"]23.11[/TD]
[TD]fps[/TD]
[TD="colspan: 2"][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Shot ID[/TD]
[TD]V0[/TD]
[TD]V25[/TD]
[TD]V50[/TD]
[TD]V75[/TD]
[TD]V100[/TD]
[TD]V150[/TD]
[TD]Ke0[/TD]
[TD]Ke25[/TD]
[TD]Ke50[/TD]
[TD]Ke75[/TD]
[TD]Ke100[/TD]
[TD]Ke150[/TD]
[TD]PF25[/TD]
[TD]Proj. Weight[/TD]
[TD]Date[/TD]
[TD]Time[/TD]
[/TR]
[TR]
[TD="align: right"]1[/TD]
[TD="align: right"]3042[/TD]
[TD="align: right"]2966[/TD]
[TD="align: right"]2887[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1232[/TD]
[TD="align: right"]1171[/TD]
[TD="align: right"]1109[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]177.96[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]12/27/16[/TD]
[TD="align: right"]12:47:27[/TD]
[/TR]
[TR]
[TD="align: right"]2[/TD]
[TD="align: right"]3005[/TD]
[TD="align: right"]2930[/TD]
[TD="align: right"]2853[/TD]
[TD="align: right"]2773[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1202[/TD]
[TD="align: right"]1143[/TD]
[TD="align: right"]1084[/TD]
[TD="align: right"]1024[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]175.8[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]12/27/16[/TD]
[TD="align: right"]12:47:52[/TD]
[/TR]
[TR]
[TD="align: right"]3[/TD]
[TD="align: right"]3009[/TD]
[TD="align: right"]2933[/TD]
[TD="align: right"]2855[/TD]
[TD="align: right"]2784[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1206[/TD]
[TD="align: right"]1146[/TD]
[TD="align: right"]1086[/TD]
[TD="align: right"]1032[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]175.98[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]12/27/16[/TD]
[TD="align: right"]12:48:13[/TD]
[/TR]
[TR]
[TD="align: right"]4[/TD]
[TD="align: right"]3043[/TD]
[TD="align: right"]2966[/TD]
[TD="align: right"]2888[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1233[/TD]
[TD="align: right"]1171[/TD]
[TD="align: right"]1110[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]177.96[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]12/27/16[/TD]
[TD="align: right"]12:49:18[/TD]
[/TR]
[TR]
[TD="align: right"]5[/TD]
[TD="align: right"]3004[/TD]
[TD="align: right"]2929[/TD]
[TD="align: right"]2851[/TD]
[TD="align: right"]2775[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]1202[/TD]
[TD="align: right"]1143[/TD]
[TD="align: right"]1082[/TD]
[TD="align: right"]1025[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
[TD="align: right"]175.74[/TD]
[TD="align: right"]60[/TD]
[TD="align: right"]12/27/16[/TD]
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[TR]
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[TD="align: right"]3002[/TD]
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[TD="align: right"]0[/TD]
[TD="align: right"]0[/TD]
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[TD="align: right"]60[/TD]
[TD="align: right"]12/27/16[/TD]
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[TR]
[TD="align: right"]7[/TD]
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[TD="align: right"]0[/TD]
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[TR]
[TD="align: right"]8[/TD]
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[TD="align: right"]2839[/TD]
[TD="align: right"]2779[/TD]
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[TD="align: right"]0[/TD]
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[TD="align: right"]2858[/TD]
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[/TR]
[/TABLE]

38% tighter standard deviation with the crimped ammo

remington jim · Nov 5, 2019

todbartell said:
I use a Lee Factory Crimp Die in almost every cartridge I load for. If I don't have one, it's because they don't make it yet. I find it tames velocity variances. At worst it doesn't hurt

Kool Im gonna BUY some and start using them ! RJ

remington jim · Nov 5, 2019

350 mag said:
semi auto = crimp

bolt. No

why ? Rj

just having some fun · Nov 6, 2019

remington jim said:
why ? Rj

if you are shooting a Bolt action and the round does not feed, into the chamber you know right away, you stop or just dump the round and feed another from the mag ....

in a semi with the force of the spring / weight of the bolt going forward if you do get a round to (ie nose dive) and you push the bullet in to the case you could get a issue,

My self, I have been loading for a a lot of years (semi m305 ) and do not use a crimp for jacketed rounds

I do have a semi that when I bought it and loaded up some cast dummy rounds, to test round feed, it did not like stuff that feed in a m305 perfectly ok

if you have a high neck tension you do not need to crimp

when you have rounds with a short neck or low neck tension , or a very heavy bullet... that is when you need to crimp

if you have ever had to pull bullets, with a hammer puller and you have to bang in 3-4 times you do not need to crimp
if bullet pulls on first hit, then you need to think about crimping
if you can do a push test and bullet slides into the case, you need to think about crimping (pushing the bullet of a loaded round against a solid object, to see it it moves)

To crimp or not

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