Need 300 WSM Load data.

[WyoHunter1]

I'm going to start loading for a new 300 WSM. I have Norma brass Hammer 181 grain bullets. Federal edge TLR 175 Gr bullets, Federal 210,215 and Win WLRM primers. I have RL 26, H4350,7828SSC and a few other powders on hand. The rifle is a 1-10 twist in a 24" barrel.
The chamber will accept a 3.070" COAL but the magazine will only accept a 2.930" COAL.

With the bullets and primers I have on hand do you guys have any suggestions to start load development. I am open to ideas. If possible I would like to develop a load at least 3000fps if it is possible and keep good accuracy.
Thanks in advance.

 

[WyoHunter1]

Somebody has to have experience with these components or similar in a 300WSM.

 

[Wedgy]

First off I would ask Steve if he has any pet loads.
Then go thru here or search;
http://forum.accurateshooter.com/threads/300-wsm-need-your-data-for-cartridge-guide.2238517/

 

[WyoHunter1]

First off I would ask Steve if he has any pet loads.
Then go thru here or search;
http://forum.accurateshooter.com/threads/300-wsm-need-your-data-for-cartridge-guide.2238517/

I did ask Steve - he just recommended using RL23 with RL 22 data. I would still like to find some RL 26 data especially if someone else has already tried the 181 Hammer with the RL 26 combination.

 

[Wedgy]

Reloder 26 has shown to spike pressures at temps above ~85F so keep that in mind.
Alliant has data for the 300 WM with Reloder 26 that can give you an idea, case capacity is 8 or 10 grains difference so keep that in mind. The Hammer Hunters generally build less pressure than others of the same weight.

 

[Wedgy]

Berger lists their 180 EH from 2,948 to 3,119 so I think you will be happy, plus Berger is on the conservative side and the Hammers usually give a little more speed for equal weight due to their elliptical side wall/lower engraving pressure.
http://www.bergerbullets.com/pdf/300-Winchester-Short-Magnum.pdf

 

[warpig602]

I'm going to start loading for a new 300 WSM. I have Norma brass Hammer 181 grain bullets. Federal edge TLR 175 Gr bullets, Federal 210,215 and Win WLRM primers. I have RL 26, H4350,7828SSC and a few other powders on hand. The rifle is a 1-10 twist in a 24" barrel.
The chamber will accept a 3.070" COAL but the magazine will only accept a 2.930" COAL.

With the bullets and primers I have on hand do you guys have any suggestions to start load development. I am open to ideas. If possible I would like to develop a load at least 3000fps if it is possible and keep good accuracy.
Thanks in advance.

Have you found that your Norma brass has a smaller case capacity than other 300WSM brass?

 

[WyoHunter1]

Have you found that your Norma brass has a smaller case capacity than other 300WSM brass?

I have never measured the capacity, I know when I load my 300WBY brass made by Norma it holds more than Remington brass.

 

[warpig602]

Odd, my Norma 300wsm brass is 2-4gr less than others are reporting from there Win.

 

[WyoHunter1]

I haven't measured the capacity in the 300WSM. I just compared the 300 Weatherby using Weatherby/norma brass and Remington brass. With a 180 grain TTSX and 84 grains of 7828 the weatherby brass still had more room for powder and the Remington brass was a compressed load.

 

[warpig602]

Yeah, I only checked the capacity on the 300wsm after starting with a middle of the road load and was already crunching powder. Seating a bit longer thank book too.

 

[Jack300WSM]

I shoot 168gr Sierra MK and NOS Accubonds in mine. 67.0gr of Hodgdon Superformance and CCI magnum primers. I get 1/2moa consistency w/around 3070fps

 

[LoneTraveler]

I bought a Kimber 300 WSM in 2004. Had to get load information off the internet, Not in reloading books at that time. The load I settled on was.
Case: New Win. with all the grunt work done.
Primer: Old Win. LR. for standard or magnum loads.
Powder: IMR 4350 Load 65.0 Gr. (Sixty Five. 0)
Bullet: 180 Sierra, 180 Hornady, 180 Nosler Partition.
OACL 2.860" Shoots all 3 bullets under .75 at 100 yds.
Elk, Caribou. and deer with these loads.

Tried 150 Gr. 165 Gr. Jacket/Core bullets and 165 Gr. Hornady GMX and 168 Gr. Nosler E-Tip, This Rifle shot non of these bullets accurately.

 

[jjmp]

Cross reference all the reloading material you can ,the answers are out there take some time and fine them . Make notes or take pictures ,different sources use (different) Brass , now there you go ,!!! Lots n lots of info is already printed and free , do your Homework it's not that hard ,Reading is learning and it'll keep you safe !!!