Bill Leeper 300 WSM

Gatehouse,
4350. I would tend toward the H4350 to take advantage of the temperature tolerance of the extreme powder lineup.
Hope you get it shooting better. If you follow these message boards, (and I know you do) then you are well aware that if it doesn't shoot 1/2moa you are unlikely to hit any of todays tricky big game animals. If you should luck out and hit one, a sub-3100fps bullet isn't likely to kill it! :lol: Regards, Bill.
 
Leeper said:
Gatehouse,
4350. I would tend toward the H4350 to take advantage of the temperature tolerance of the extreme powder lineup.
Hope you get it shooting better. If you follow these message boards, (and I know you do) then you are well aware that if it doesn't shoot 1/2moa you are unlikely to hit any of todays tricky big game animals. If you should luck out and hit one, a sub-3100fps bullet isn't likely to kill it! :lol: Regards, Bill.
Click to expand...

HAHAHAHA

That's exactly it!! If it's going less than 3100fps- the bullets will bounce off! :D

I'm goign to try H4350 tonight to see if it will shoot any "better" :D



All kidding aside, I want to see if I can get around 3000 fps with low pressure. The H4831 gets me the velocity, but I have concerns with the pressure. :D

But Bill, I must say, I am impressed to get 7 shots of different powder charges in a group only slightly larger than a quarter... :shock:

So, thanks... :D
 
This Leeper character beat me to it, :p but H4350 would also be my first choice in that rifle. Temperature insensitivity coupled with a more dense powder than good old IMR4350. Should be hard to beat with 165-180 grainers. It's amazing how many rifles I have played with where I came back to 4350.

BTW, when I first got my Leeper 284 which as you know is a virtual twin to your 300, Bill's words were that it would shoot under an inch easily and shoot group into 1/2" on a somewhat regular basis. Or something to that effect. That rifle averaged 6/10" for 3-shots at 100 yards with 140 NP's. Not one group or occasionally, but averaged that. It averaged better than that with 139 SST's, including several groups at or under 1/4" including my all-time best 3-shot group of 0.008" at 100 yards. I would be very surprised if your rifle doesn't shoot as well.
 
Rick, that is pretty good accuracy!! :D

I am pretty damn sure that this rifle is more accurate than I am!

If you look at the target I posted, and start at the single bullet hole ont he top right, and then go clockwise...

65gr is the single bullet. Then 66 and 67 touch, likewise wiht 67.5 and 68, and also with 68.5 and 69. i am sure if I had used one single powder carge of 68gr, they would all be laying on top of each other, giving me that magical sub 1/2" group that is necessary to kill animals thee days!! :D

As it was, i fired the last one at 5:59 pm and had to pack up and pick up my GF in town by 6PM, so I never tried 3 of the same.. :wink:
 
Well, I tried H4350 with similar results.

62, 63, 63.5, and 64 all piled up on top of each other, but when I tried 64.5gr the bolt locked up a bit... I tried 3 rounds of 64 with a average of 2960 fps, which is fine, but one of the rounds was a little sticky.

The TSX bullets are to blame, using 180gr Partions(heavier) and a higher powder charge, I had no problems. I know some peopel encounter high pressures with X bullets, but I've never seen it like this. :shock:

The 3 driving bands were supposed to reduce pressure! :mrgreen:

I think I will jsut use 63.5gr H4350, and let the bullets loaf along at a lesiurely 2950fps. :D

The 180gr Partitons shot just fine, too. :mrgreen: The 150gr Hornadys did not, (1.25") :roll: but by the time I shot them, I was pretty tired, and the barrel might have been fouled by that point, anyway. :wink:
 
Gatehouse,

Seems strange that your getting those pressure signs at so low a charge. I went to the range today to pursue the lofty goal of 168TSX @ >3100ft/s.

Rifle: Tikka T3 Lite Stainless .300WSM
Primers: Fed GM210M
Brass: Win
OAL: 2.875

DISCLAIMER****MAX Loads (or close to) work up to slowly*****

H4350
64 2941
65 2977
66 3017
67 3087

H4831SC
71 2931
72 2939
73 3039
74 3040

Reloader 19
69 3031
70 3049
71 3086
72 3123 8)

Looks like it'll be the RL-19 for me......
Hope this helps somebody..................
 
Yeah, it does seem strange.

I was thinking if I shouldn't have used the 210M primers instead of the 215M ones, too. That size load probably doesn't need mag primers, but I have used them in all my mag rifles.

I really don't have much of an explanation, since I didn't get any pressure signs with the Noslers. I am pretty sure the bullets were not jammed intot he lands, either.

RL 19 has been the powder fo choice for alot of guys shooting the 168TSX. I'm almost out, and I doubt I'll get any soon. :cry:

Besides, I need to zero this gun and go kill a sheep with it. 2900 fps wil be fine for now! :wink:
 
I was thinking if I shouldn't have used the 210M primers instead of the 215M ones, too. That size load probably doesn't need mag primers, but I have used them in all my mag rifles.
Click to expand...

I'll load a few up w/ GM215's tommorow and let you know how it goes - as I like using the mag primers when the weather gets a little chilly here in Alberta.
 
BIGREDD said:
How much free bore do you have before the rifling? All the factory WSM's are free bored like weatherbys to avoid pressure spikes.
Click to expand...


With TSX's I've been running about 0.188" off the lands, which is about as close as I can get due to mag restrictions.
 
IIRC Bill Said he went wiht the Winchester specs.

I was seating the bullets about .050 off the lands, as suggested by Barnes for X bullets. I hadn't looked at a differne tseating depth for the TSX, maybe I should. :?
 
I don't shoot a 300 WSM but two of my buds have been shooting them for 2 yrs, one likes Winchester WXR and the other uses W760, both use standard Winchester primers WLR and 180 gr bullets.
bigbull
 
I was thinking if I shouldn't have used the 210M primers instead of the 215M ones, too. That size load probably doesn't need mag primers, but I have used them in all my mag rifles.
Click to expand...


Tried a few loads w/ RL-19 using the GM215M primers, not too much different from the LR primers & still no pressure signs.

Reloader 19
69 3038
70 3062
71 3089
72 3119
 
BIGREDD said:
Have you thought about Moly coating the bullets... it certainly reduced the pressure in my Short Mag.
Click to expand...

Might as well try the XLC"s then.

Gatehouse.

If you want to try and moly them, let me know. You seen the job I done on mine. I have all the equipment. Times running out though....tic toc! :shock:
 
Moly a TSX? SOunds sacrilgeous to me!! :D

Im pretty busy every weekend until hunting season, I think i am just going to load up about 25 TSX bullets with a moderate charge, zero the rifle and go hunitng. I'll have the velocity of a 30-06AI or so... :mrgreen:

After hutnign season I'll really start to work on it. Between Haggisfest, sheep scouting, verious social events, the pump in my well breaking, a fishing trip to Nootka sound and spending quality time with the GF..

I'm a busy guy, and I don't think I'll have enough time to do esoteric experiments. :D
 
Gate,

Just out of curiosity, what pressure sign were you getting w/ 69gr H4831? Flat primers? Burnishing? Sticky bolt? Case measurements? Just for knowledge sake...
 
AOne

I was getting a sticky bolt.

I switched over to some 210Match primers today and shot 70gr H4831 with no pressure signs. Maybe it was indeed the primer.

No idea what the velocity was, as I just shot in my backyard, without setting up the chrono. :D

The 70gr load should be around 3075fps, since 69 was about 3020. That is plenty fast enough. :wink:
 
The 70gr load should be around 3075fps, since 69 was about 3020. That is plenty fast enough.
Click to expand...

Excellent!

A lot of my buddies own .300WSM's and are content to shoot at 30-06 velocities -'tis quite the waste!

My hunting load will be 71.0gr RL-19 @ 3085ft/s

Truth be told - I've managed to get over 3200 w/ the 168 TSX's.
 
Yes. Leeper wil be happy knowing that I will be shooting sub 1/2MOA groups with a bullet travelling at around 3100fps! :D

Now that I think about it, one of the loads I used in my 7RM was touchy with 215 mag primers. I switched to 210's and the pressure dropped. And I htink it may have even been an X bullet, too! :D :shock:
 
You must log in or register to reply here.
Back
Top Bottom