Your rifle is adequately strong the .30-30 brass design will fail before the gun. Having said that I messed around with several over the years and the "better performance" options are: shoot Hornady Leverevolution .30-30 or have it reamed to .30-30 AI. NOTE: the mag will not work with the .30-30 AI so it will become a single shot. I resolved to shoot factory(any brand) 150 grain soft points in mine.
Darryl
I load my 340C and my 340A to the max. I use leverevolution components and actually come out a bit faster than commerical. These guns have never let me down.



























