BBLV
FNG
@TxLite Thanks for all of the data on your 18" 7PRC with N570. It was extremely helpful for me as a starting point. Just so happens my new build is very similar - Defiance TiX LA w/ 18" Preferred carbon 1:7 twist barrel. Running Cutting Edge 185gr Lazer copper bullets. COAL @ 3.53" which puts me 0.02" off the lands on the new barrel.
I just got back from clocking my first test loads, laddered from 65gr to 70gr with 1gr jumps. My speeds were almost exactly what you posted earlier in this thread. My 70gr loads has zero pressure signs. Unfortunately I only loaded up to 70gr (averaged 2,658fps), but I'm confident my next test ladder will get me to my target of 2,800fps with 73-74gr.
FWIW my QuickLoad estimates show about 200fps slower than the real world speeds across that intial ladder and QL estimates pressure at 58k psi with 75gr N570 at 2,668fps with 101.1% case fill at my COAL of 3.53" with the CEB 185 Lazer bullet.
I just got back from clocking my first test loads, laddered from 65gr to 70gr with 1gr jumps. My speeds were almost exactly what you posted earlier in this thread. My 70gr loads has zero pressure signs. Unfortunately I only loaded up to 70gr (averaged 2,658fps), but I'm confident my next test ladder will get me to my target of 2,800fps with 73-74gr.
FWIW my QuickLoad estimates show about 200fps slower than the real world speeds across that intial ladder and QL estimates pressure at 58k psi with 75gr N570 at 2,668fps with 101.1% case fill at my COAL of 3.53" with the CEB 185 Lazer bullet.
