I've never heard of it. I have some in 6.5 Creedmoor to use until my Lapua brass shows up.

What are you shooting for a bullet. I was told that it was Norma Brass

Well,
I have a lot of different bullets when I get the rifle up and running. It will go in a new Eliseo Chassis that was given to me. We don't shoot that type competition, but will play with it. I do think it may have been on Norma brass.

sounds like you have a plan. FREE tube chassis.
I shot a 308 built on David Tubbs. it was underscoped for me I like as much power as I can get. his was dedicated action and was epoxied Shot like a lazer out to about 600yrds.

The Prime ammo uses Norma brass and bullets and is typically very consistent with low SDs even between lots. The only real downside is the velocity is usually slower than can be achieved with even conservative handloads.

I've tried the .308, 6.5Cm, and 77gr 223. All have shot very well out to 840yds.

Great to know that. My Lapua brass arrived. I think I am good to go.