300 WSM load workup

[haisardao]

I would like some advice from all the knowledgeable people here as to what do next.
I had worked out a load for 300 WSM using 70gr of N565, Berger 215s, Fed 215M, and ADG brass with a COAL of 3.145. Rifle was built in a LA receiver using a 26 inch Proof CF barrel.
Well at 100 shoots 3/4 MOA @2850 with an SD of 8.
Here's the issue, took it today to the 300 yard range and it kind of sucks, 4- 5 inch groups. All hardware appears to be on point. Now what would you do next, switch powders? Bullets? I'd like to stay with the 215s if possible.
Thanks
H

 

[Greta06]

My first change other than seating depth is always powder. I would think 565 is a little slow for 300wsm, but I have never run that heavy of a bullet in the wsm... H4350 or R16 is always a go to in 300wsm for me, but I'm running much lighter bullets.

 

[Rick Richard]

Even with that heavy of a bullet, some BR guys are running H4350. I run it but with 180 grain bullets.

 

[wvbearhunter]

Have you tried any factory ammo? To see what the gun is capable of?

 

[haisardao]

Have you tried any factory ammo? To see what the gun is capable of?

Yes, it shoots well. Good thought.
Thanks

 

[Muddyboots]

Twist?

 

[adk hunter]

Tag...

 

[wasskeet]

This might be of help:

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[K.E.C.]

Typically you work with powder charge weight ( by a tenth) and seating depth.
Comments on 4350 has been proven to be very good in the WSM.
If you want 300yds accuracy, you shoot at 300yds for load development, not 100yds.
Hope this helps.

 

[bfarms]

I'd try h4350. I run it and I have tried n550 in mine also.

 

[haisardao]

Thanks all, it's a 1:9 twist.
I normally look for pressure and seating depth at 100 and then go further.

 

[haisardao]

Typically you work with powder charge weight ( by a tenth) and seating depth.
Comments on 4350 has been proven to be very good in the WSM.
If you want 300yds accuracy, you shoot at 300yds for load development, not 100yds.
Hope this helps.

I agree, shooting at desired distance is ideal but unfortunately not that easy as range is not nearby. I can drive 50 minutes for the 300 yard range or 1:30
Hours for the 1000 yard range, unfortunately work gets in the way of my plans usually .
I'm loading a ladder from 55.0-62.0 gr of H4350 and find pressure. Let's see what happens.
Appreciate the input, I'll update the pressure ladder results hopefully next week.

 

[haisardao]

This might be of help:

You are being redirected...

This was very helpful, thank you, the H4350-H4831SC burn rate appears to be a constant in the thread.
I'd love to have try RL23 but it's near impossible to find. I do have RL17,19,22, and 26 but I'm afraid I'll find a load and then run out of powder as I have only a couple of pounds.

 

[Laguna Freak]

This was very helpful, thank you, the H4350-H4831SC burn rate appears to be a constant in the thread.
I'd love to have try RL23 but it's near impossible to find. I do have RL17,19,22, and 26 but I'm afraid I'll find a load and then run out of powder as I have only a couple of pounds.

I haven't done a lot of work yet with my long action and RL23 pushing 200 and 210 gr Accubond down a 1:8.5 Bartlein CF 26". But so far the 210 seems to consistently group smaller. I consistently get 0.3 to 0.5 moa groups in a short action with RL16 pushing 180 Scirocco II down a 1:10 Brux SS 26". Both lit by WLRM. This info may help you with burn rate:bullet weight ratio since neither powder seems to be readily available these days. Otherwise RL23 has been widely reputed to provide stellar performance with 210 to 230 gr in 300 WSM with 1:9 twist.

You might look at the burn rate of Ramshot Grand and H1000 if they're available near San Antonio. Wrong side of town for you but Trainer Hale Shooter Supply may have what you're looking for.