Originally Posted by IdahoCTD
A slow powder in a 7RM is generally a faster powder for a 7STW. So comparing the same powder, no matter what it is, makes it already faster in the STW. If you go even faster you can get some velocity back but a lot of times you lose accuracy. There is definately a point of diminishing returns when you go to shorter barrels in high capacity cases.
I know 7 STW's quite well. I currently have 3 of them and have built 10+ for myself and several for friends over the last 20 years. I've shot bullets from 120-180gr in 24" to 30" barrels. 130gr Sierra Single Shot pistol bullets and 180gr JLK's/Bergers do amazing things to rockchucks, squirrels, crows, coyotes, etc. It and a couple different .30 caliber magnums use to be my go to rockchuck guns. I personally wouldn't build one in a 24" barrel again. I'd build something like a 7mm-.300 Win Mag. or a standard 7RM.
"Point of Diminishing Returns" is somethign I see throughout the 7's. You can just push them so fast and when you pass that point it seems like no matter how much more powder you put in there you just aren't getting much in return.
It doesnt' seem to much matter if you are talking .280 Rem or 7 Rum, they all seem to be that way.
I like the 26" for a rifle I'm going to have to carry, but when I rebuild my current 7STW It's losing the magnum sporter taper 26" and moving up to either a 28 or 30" in a Sendero Taper.
It does get to be a PITA though finding cases to fit them... .