Thank you!Norma, ADG, Bertrum in that order accuracy wise for me.....the ADG and Bertram is gonna take more powder.....WSM brass is tough as boot.
Bertram is in stock here..... https://bertrambrass.com/shop-1/ols/products/300-wsm-winchester-short-magnum
I've loaded 181 hammers with the standard freebore amd they are shoved in the case quite a bit, but woth Staball 6.5 powder, I am getting 3040 fps and great accuracy....lots of mag space to go as well. All on a short action.If my math is correct, the 181 Hammer Hunter would take a little over 3”.
Thank you for all of the info- really curious to see what it looks like at 900!ADG brass is hands down the best option for the wsm. Pockets are very strong and the brass is very consistent. Ive built two 300 WSM's for myself in the past 8 months and quite a few for customers. My first one is on a Defiance ANTIX xm w manners lrh, benchmark carbon 22" 10 tw and is shooting the 205 elite hunters at a super mild 2750 fps with h4350 and stupid accuracy. Lost track of the 1/4 moa and smaller groups Ive shot at my 580 yd berm. Shot a 3.1" group at 1000 for 4 shots with it as well. 5 different powders I tried would shoot bugholes. My new 300 wsm is on a long action cause I wanted to try the 215 and 220 bergers and fit in a magazine. Same setup. Defiance ANTIX long action, manners lrh, benchmark 23" 9 tw, hawkins hunter bottom metal and magazines with spacer kit, and a TBAC dominus SR suppressor. 8.0 lbs with suppressor, no optics or bipod. Found a super wide node with N555 and the 215 bergers at 2730-2750 fps on the ladder test. So I went back to see how wide it was. 1.2 gr spread in powder was a 1.69" group at 580 yds. Loaded 3 up in the middle of the node at 64.1 and shot a sub 2" group at 580 with it. At 100 it bugholes. Just got a 900 yd berm put in this week so I will test a couple seating depths at that distance next time we get a calm day.
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