I'm shooting my 100 ttsx through my 20" AR with OAL of 2.275, in an AR mag. Many AR magazines will allow OAL greater than 2.260, like CP, ASC, Duramags etc. The Elander is tightest (from what I recall, I do not use them for this reason) at ~2.260.
My duramags will allow seating out to 2.295" and still work for them.
I shoot 129 ABLR's at 2.295, again out of an AR. I can go (and have gone) even longer in a howa or Ruger predator, which is what OP has, a bolt gun.
Someone can certainly stick with 2.260 if they like, or even 2.235 (Barnes book value) for the ttsx. Or you can find what works best in your gun with your barrel.
Edit to add, the only factor really limiting the Ruger is how well a particular cartridge will load from an AR mag -- I have had trouble in the past with that on a couple Rugers... some folks however have reportedly fixed that issue in theirs, so for Rugers you just have to try and see.
My duramags will allow seating out to 2.295" and still work for them.
I shoot 129 ABLR's at 2.295, again out of an AR. I can go (and have gone) even longer in a howa or Ruger predator, which is what OP has, a bolt gun.
Someone can certainly stick with 2.260 if they like, or even 2.235 (Barnes book value) for the ttsx. Or you can find what works best in your gun with your barrel.
Edit to add, the only factor really limiting the Ruger is how well a particular cartridge will load from an AR mag -- I have had trouble in the past with that on a couple Rugers... some folks however have reportedly fixed that issue in theirs, so for Rugers you just have to try and see.