Originally Posted by Coyboy
I was shooting Richards listed load in my f-class gun, a 30" barrel was giving me 3025 fps.
started to show some pressure with barrel heat during long stings of fire, so today I loaded down 200 cases to 50.6, and I culled out about 12 pcs of twice fired brass that had loose pockets.
Retumbo might be a tad slow for it.
The same 51.3gr of h4831sc in my 30" (1:8") Savage 12F only gained me about 50 fps vs my 24" (1:8.25") Kreiger barrel with a match chamber. And, it was beginning to show some signs of pressure in the Savage.
I would've expected a bigger gain with a 6" longer barrel whereas Coyboy reports 125fps gain with his 30" barrel.
Maybe this new rifle is exceptional? Or, perhaps my chrony is off? I wonder now how much difference there is in the COAL/case capacity?
I guess it just shows that every rifle is different.