40.1 gr. H-4350 with a 115 gr. bullet should be running around 2,650 fps out of a 20" bbl, based on Load Data info.
I'm a good bore sighter, too. Can just about put one on the paper at 100 yds.
The Hawkeye borescope lets you look at the bore with a 90* mirror, seeing exactly what the rifling looks like, if there's throat erosion, if there's carbon build up or fouling, if there's pitting, etc.
DF
That's about the velocity I was expecting.
Thats actually about the velocity I have seen with old Remington 117 gr factory round nose bullets. The Roberts can be heated up quite a bit over those velocities with todays powders....actually anything from IMR 4831, RL22,and others will do it as well.
Most all of mine have had 22" barrels but there has been a 24" or two tossed in along the way as well.
