had the cronny out today, tested a few different guns, results...

aheppner

aheppner

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so got the crono out today to test a few loads/guns,


first gun was a ruger 77 in .270, 150gr sst with 52gr of 4831 /my dads gun

2697
2697
2692
2731
2728
2706
2714
2687
2681
2700
2672 not to bad but we are going to try a grain more and see

next was a .243 with federal premium 55 gr nosler ballistic tips bullets/ brother inlaws gun

3780
3827
3851
3805
3696
3789
3728
3693 the box said it should be 3850fps so i think it was close enough, this gun only had a 22'' barrel


the last gun we shot was mine savage 12 F/TR 30in barreled .223

the load is 80gr Amax over 25.3 gr of Varget, Lapua brass and BR 4 primers

2945 first shot with a clean barrel
2992
2981
2957
2978
2994
2987

the average without the fouling shot is 2981.5fps, Is that a respectable speed for a 80gr bullet?

the book says 2850 ish but i thought i would gain more then that with a 30'' barrel

i don't think i will change my load because it shoots tiny groups, but what are some of you other .223 guys getting for speed with 80gr bullets??

any compatibles would be helpful

thanks, Alex
 
aheppner said:
so got the crono out today to test a few loads/guns,

next was a .243 with federal premium 55 gr nosler ballistic tips bullets/ brother inlaws gun

3780
3827
3851
3805
2696
3789
3728
3693 the box said it should be 3850fps so i think it was close enough, this gun only had a 22'' barrel



thanks, Alex
Click to expand...

That is a typo correct?
 
I'm using 24.6gn of Varget with my 223 and getting ~2830fps with the 80 amax out of a 26" Shilen bull barrel. With this load I shot a personal best at 500m at Kamloops two weeks ago. Shot one round clean 75 v9 for the most part it was shooting waterline the whole day. Measuring to the +/-0.02 of a grain of accuracy with the gempro made a huge difference.

Your load sounds about right with the vel. you're getting. Have fun with it.
 
When I had a .270 Winchester, a Model 700 Classic, the load from the Nosler book most accurate powder and load was 52 grains of H4350 for their 150 grain bullets.
This has been used with other manufacturers bullets and ran 2700 fps plus from the 22" barrel.
 
In the 270, with 150 grain bullets, I expect to get 2850 with a 24" barrel.

2800 should be doable in a 22" tube with the right powders. [H4831, Norma MRP, IMR7828, Vihtavuori N165, etc]

I feel that the various 4350's are a tad fast for max velocities with the 150 in the 270.

Eagleye.
 
I always wonder why people get a long range, flat shooting calibre like a 270 Winchester, a strong rifle like a Ruger 77 to shoot it in, then load so light.
Don't ge me wrong here, I am not telling you how you should load your rifle, but am just going to give you some of my results.
I loaded a 270 Sako L61 up to 59 grains of H4831 with 150 grain bullets.
Here are some of the results.
With 150 grain Hornady spire point bullets, a 3 shot group at 100 yards of 1.25 inches.
Same bullets and load at 300 yards, 2.5 inch group.
Sighted 2.75" high at 100 yards it was 2 inches low at 300.
I chronographed this load, five shots. High was 2929 and low of 2907, for a spread of just 22. I will also add that H4831 is not the most accurate powder for metering in a standard powder measure, but that is the way I made all my loads, just using the powder measure, once it was set.
59 grains of H4831 and 150 grain Norma bullets made a five shot group at 100 yards of 1.25 inches.
Sighted 2.75 " high at 100, this load was 34 inches low at 500 yards, with top to bottom group of 6.5 inches.
I also tested both the 130 grain load of 60 grains of H4831 and 59 grains of H4831 with 150 grain bullets, in a Harrington & Richardson 270 and neither load showed any excess pressure.
 
H4831 said:
I always wonder why people get a long range, flat shooting calibre like a 270 Winchester, a strong rifle like a Ruger 77 to shoot it in, then load so light.
Don't ge me wrong here, I am not telling you how you should load your rifle, but am just going to give you some of my results.
I loaded a 270 Sako L61 up to 59 grains of H4831 with 150 grain bullets.
Here are some of the results.
With 150 grain Hornady spire point bullets, a 3 shot group at 100 yards of 1.25 inches.
Same bullets and load at 300 yards, 2.5 inch group.
Sighted 2.75" high at 100 yards it was 2 inches low at 300.
I chronographed this load, five shots. High was 2929 and low of 2907, for a spread of just 22. I will also add that H4831 is not the most accurate powder for metering in a standard powder measure, but that is the way I made all my loads, just using the powder measure, once it was set.
59 grains of H4831 and 150 grain Norma bullets made a five shot group at 100 yards of 1.25 inches.
Sighted 2.75 " high at 100, this load was 34 inches low at 500 yards, with top to bottom group of 6.5 inches.
I also tested both the 130 grain load of 60 grains of H4831 and 59 grains of H4831 with 150 grain bullets, in a Harrington & Richardson 270 and neither load showed any excess pressure.
Click to expand...

sorry i didn't specify that i was using IMR 4831 not H4831.

hodgdon book max load for 150gr bullet is 55.7 gr of H4831 and 53 grs of IMR4831 , that's probably why my dads load looks so light.

we are going to try 53 gr and check how it groups,

this is the first load we tryed with the SST bullets
 
Hornady's latest book states that in a 270 Win, with a 150 grain SST, and IMR4831 a max of 53.8 grains. And for H4831 a max of 57.3 grains.

Just an FYI.

Also, the more modern reloading data from manufacturers seems to be very conservative compared to the older manuals. Fear of lawsuits would be my guess, even though the older data worked great. Just keep working up until you find signs of too much pressure, then back off to what was most accurate is the practice I use depending on the firearm of course.
 
Just looked up 270 Win with H4831 in a 1998 Hodgdon book, it states 58 grains at 3015 with a CUP of 52,600.

Just for chits n giggles anyway, either powders have changed a lot, or they are getting conservative
 
The 270 I am shooting at present has a 24" barrel.
In it, with the 140 Accubond, I chronograph 3000 and pennies.
With this load, I took the longest one-shot kill on a game animal.
Wonderfully flat, and plenty of energy, even well out there.
H4831's comment sound reasonable to me, since I have seen 2900 with the 150
as well. I certainly would not be settling for 2700.
Eagleye.
 
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