He said both would work just fine. I was wondering about the experiences people have had with them.Call Jim, l'm sure he could help you out.
Hal
Are your BR actions nitrided? I forgot to mention I'll be selecting that option on the build.My benchrest rifles are built on rimrocks: a BR and a BRL. Both bolts have a nice snug fit to the receiver and pretty aggressive fluting on the bolt bodies. I’ve never had them bind, but if they get dry and dusty, they don’t glide like they do on a thin film of oil.
My BRL is DLC coated, the BR is plain. Yeah, oiling the bolt and receiver isn’t practical for anything field oriented. I’m not sure how it would do since I exclusively run it clean and oiled, to the point of covering the whole rifle with a towel when I’m not actively shooting it to keep it all perfect for the next string. I’d trust Jim if he says it works in dusty field conditions.Are your BR actions nitrided? I forgot to mention I'll be selecting that option on the build.
I won't be using it with oil on the bolt. It'll attract too much dust.
I use the same for lugs. I was at a match in New Mexico that was very dusty. The wind suddenly picked up to close to 50mph. We still shot though. I thought I was going to ruin my action lol. I could feel the grinding of dirt on the lugs when I closed the bolt.Both would be fine. Some guys feel like a looser bolt is less likely to bind up but I have never seen anything to make me believe it. I have hade some pretty dusty rifles out hunting and doubt you would ever get one that bad in a match. Or that would not be a very fun match to be at! Since your not going to notice any accuracy difference go with the looser fit because thats what all your shooting buddies will say you should have doneThe thing that will actually make a difference is getting it nitrided and run it dry. Brake clean dry. I still do a pin head drop of tw25b grease one the lugs though.
It looks like the Rimrock is the way to go. I don't like cock on close.jim also sets up the bolt different on the two. The Rimrock is set up for a neutral hand off with the trigger and the alpine is set up with a small amount of cock on close. I believe he changed to that on the alpine and timberline a few years ago as some people was complaining that the opening was to hard.