My Ruger .35 Whelen as a custom barrel and I believe the chamber was cut on the tight side. I get 2700fps out of 225gr TSX with 55gr of RL15 in a 22" barrel. Much lower charge than most people.
it takes 60gr of R-15 to get 2700fps out of my 22" bbl rem 700, 63gr of varget is just over 2900fps, with the 225TSX. Standard load is 61gr Varget and a 250FXB, 2684fps since 1996. varegt really works well in my rifle, it is long throated and I seat the bullet 1 caliber in the case. Top load for varget (55gr) and a 250gr bullet is 2300fps. Of course there are industry standards but each rifle is an individual and must be treated that way. I was not getting typical velocity for the powder charge, this tells me I can add more powder to get typical velocity, so i did and stopped at 63gr for the 250 bullet beacause of eradic ignition 100fps SD, so back of two grs and SD is about 10fps , good hunting groups, no problems in 10 years and many hundreds of rounds expended.
