Originally Posted by el matador
Feenix, that data might be wrong for the 270 Ackley...I don't even think a 7 STW could push a 175 grain to 3100. Good lookin charts though, great way to compare different loads/cartridges.
Sorry, I should have explained. That is my ultimate goal for velocity but I'll take accuracy over it anytime. I am pushing the 175 at 2919 FPS (SD=16) with 57.5g H4831SC, BR2, Win brass while fire-forming to AI off my 3-groove, 1:8, 30" Lilja barrel.
I have achieved 3147 FPS (SD=16) with 62g IMR 7828SSC but with signs of pressure I can do without.
Got some more loads with H4831SC and H4350 but haven't had a chance to make it to the range yet. Also, working up some Retumbo loads.
NOTE: I used the ballistic calculator (I believe it's the same as what Berger's have on their site) to generate the information then plot it on a chart using powerpoint graph function.
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