My 25SST is a 1:7.5". It was built originally to run the 131 BJ Ace. It shoots tiny groups with them, and they are wicked on game. But...unavailable.Lance, What twist are you using for the 120 to 135 grain 257 and what cartridge? I am in the same boat as the OP. 300 WBY Mark 5 action and am considering the 257 WBY.
I built a 25-300. It’s an awesome round. I have to load it down and keep it around 3500fps but it’s a shooter.I’ve got a donor action from a 300 weatherby I’m wanting to build a rifle on. I’m thinking I may want something in 25 caliber and have been looking at the 25 PRC or 25-284. I would probably run 127 grain hammers or 131 grain blackjacks. Is my weatherby action too much action for this chambering? I’m not opposed to buying another action. Are there any other quarter bore hot rods I should be considering? Oh, I’ll mainly be using this rifle on Texas deer and varmints. Might try it on antelope if I ever draw a tag.
Yes I have custom dies from Hornady. I shoot either 115 gr Berger’s or 120gr barns out of it. I can’t remember the twist off the top of my head but I’ll look when I get home and let you knowWhat bullets are your shooting and what twist is your barrel? Did you have custom dies made?