Many thanks to everyone who has given their input! I've spent a few hours researching all that have been mentioned and I'm leaning towards the Terminator. I haven't been able to find much info on Kirby Allen's but will do so before pulling the trigger thanks to Bsnyder saying that he preferred it over the Terminator.
Found this…
Keep in mind the size of rifle vs break. A smaller break on a 300 PRC will work much better on it than a lapua sized break like a t4 terminator. But when you move up to Lapua then the T4 foes much better than the smaller brake. Apples to Oranges.