Who uses them? Pros/cons? I haven't found any local to try them. Just wanting some input before I ordered some.

Used'em not any "pro or con" other than back off 10% if you change componets.If your gonna reload a really large case (100grains +) i'll recommend Federal 215s.

I've been going by the recommded data. Some calls for Rem 9 1/2M, but I can't find any. I have cci 200 & 250, Fed210M & 215, and WLR & WLRM. Do different primers affect velocity or just accuracy? Or do they affect enough to matter in a hunting rifle?

Yes....depending on your barrell bedding etc.

Crap, I was afraid you were gonna say that.

My 28 Nosler shot like shat this week with Fed 215 primers. Went back to my CCI and shot under 1/2" groups.

I stick with winchester, federal and cci. For large rifle I like the winchester best. You have to back off and work up your own load anyway so the brand primer in the load data dont matter. Each rifle is different

If you were closer I'd give you some I bought thinking they were regular 9-1/2.

Just swap to Fed 215 if it is a magnum and move on. You can never duplicate the load manual anyway. You are just using it as a guide.

You pull a Nosler manual and you'll see mainly Winchester, Federal primers. Pull a Speer and it will all be CCI primers.

215's are hard to beat for magnums and easy to come by. I'd start there. WLRM are just fine as well.

I'll be trying the same load with 3 different primers for an accuracy check. It'll be interesting to see the results.

Thanks for the offer.