Hi!

I rebarrel my Ruger no 1 from 243 Win to something in caliber 45. But it�s difficult to choose between 45-70 and 45-100 right now. I allready have a 458 WM and 458 Lott in caliber 45 in bolt rifles and also one .500 NE on a Ruger no 1.

I like to reach +2100 fps with 400 grains bullets and 2200 fps with 350 grains bullet in this rifle and I think 45-70 is good for that when I�m looking at load data from Accurate powder for the caliber 450 Marlin and 45-70.

I�m fraid about the case life if I load 45-70 that high, but I don�t know, maybe there is no problem with that at all.

Now, I wonder if anyone here would like to help me to choose on this two calibers, and maybe answer my question about the case life. I would be greatful if anyone had load data for the caliber 45-70 too.

Best regards
Karl-Erik kalle.kes@telia.com

Erik,
The loads you mention are indeed top-end in 45-70, but on the other hand 45-70 brass is so very much cheaper and available then .45-100 - and the issue is more one of you being able to handle the loads - just make sure the barrel is heavy enough, and the standard Ruger #1 in 45-70 is quite light, and can be rather vicious with top-end loads...
Also, you can always punch out a 45-70 to 45-100 (just 1 reamer away) - but the inverse is not true.