I think it is more of commenting before he has tried handloading a Roberts.
ddj
Looks like....
115's over 3K were not a real big problem in the Roberts....and over 2900 with 120's. Some easily did 3200 with 100 gr bullets;all reasons why the 25/06's went bye bye when friends and I saw these vels....I'm talking well in excess of a dozen or more rifles.
Nuthin wrong with JB's data for the Roberts....
