I can say my Remington SPS Tactical 20 inch is 1:12 for twist!

 

There are two 20" SPS Tactical models I think. Mine is 1:12 and doesn't have the threaded muzzle. The AAC is 1:10 I believe. My 1:12 barrel loves 175 SMK with 43.8 Varget



My general blasting ammo is 42gr 4064 with 168gr Hornady BTHP, Wally World usually has those on the shelf.

 

Factory Ball ammo is just that ball ammo

Now match is good stuff especially the 168 FGMM ammo it's nuts what groups it can give off. The best pricing I have come upon was 23.50 shipped for the 168 FGMM. But even at that the price that you will get from reloading will be at least $.50 a round if not cheaper.

And WySPS yes the SPS Tac ACC-SD is a 1-10 while the original SPS Tac is 1-12.

 

1:10 is for the heavier bullet. The bullet you may suppress and at the same time have a relatively good accuracy. I shoot 180 grn hornady I am getting a good groups at 100. Did not rally try any farther.

 

 

You should have a 1:12 Twist if you don't see any other twist marked on the barrel.

 

Thanks for the information. I've been away from the computer for a couple of days, thus the late response. The barrel isn't marked concerning the twist rate. I've shot .308's for years and I've recently been bitten by the long range shooting bug. The Federal 168. Grain Gold Medal Match shoots great out to 600 yards and after that it becomes a little iffy. I think at around 700 yards or so, it becomes sub sonic and the accuracy falls off.
The lighter bullets just don't stabilize with the rifles twist rate. I've got to get started reloading. I'm thinking about going with IMR 4064 with a heaver bullet (maybe a 177 grain A-MAX) over a 40.0 grain charge of the 4064 and see what it likes.
I would like to find a cheaper bullet for practice, any ideas?

 

The Federal 168. Grain Gold Medal Match shoots great out to 600 yards and after that it becomes a little iffy. I think at around 700 yards or so, it becomes sub sonic and the accuracy falls off.

There's a saying among many LR shooters. "The only way you can get a 168 gr bullet out to 1K accurately is to put it in the back of your pickup truck and drive it out there." Unless you handload and build a real big fire below a 168 gr bullet it's tough to shoot it at LR accurately for he reason you stated, it goes transonic and starts to wobble.

An exception would be if you treat it like Palma shooters treat their bullets. 30 inch barrel, small primer pocket brass, and high energy powders loaded to charge weights way above anything published as max. Definitely not for a beginner.

For the A-Max you might want to start closer to 42 gr of IMR 4064 and work up. My accuracy load from a 24" bbl is 44.0 gr IMR 4064 with the bullet seated so it just touches the lands with a 175 SMK or TMK and back .020" when using the 178 A-Max. All use the same powder charge weight.

 

i have an sps tactical with the 1:11 twist. hornady superformance 168 gr. ammo works well in mine

 

I'm thinking your talking about the 178gr A-Max Russ... It is a great LR bullet that will not let you down for sure!