Geezer, I was originally going to go with the Large PK, but Kirby said he was out of stock and didn't know when his machinist would have them back in. He didn't return my most recent e-mail, so I went with the T4 Terminator brake.

I have experience with the T3, which was excellent on the .338, but the T4 is optimized for Lapua sized and larger cartridges. It's very similar in design to the FB, so it may be another option to look at.

There are plenty of videos on YouTube that Terminator products compares their brakes to, so check some of them out and you'll see what I'm talking about. Good luck.