Cz-527

[stokesrj]

Is anyone seeing ¼-½ moa out of their bolt (or falling block) Grendels?

If so, what did you have to do to the rifle to obtain such accuracy?

Bolt guns are surely capable of this kind of accuracy but it isn't something you just slap some parts together and expect it to happen. First you need a quality barrel, there are plenty of them out there. The barrel needs to be turned on center to the desired profile, you would be amazed at how many barrels are turned slightly off center resulting in more metal on one side of the bore than the other. Then the barrel needs to be chambered in line with the bore, few do this to the extent needed but some do. Then the action needs to be true and square, many people are capable of doing this work with the right tooling, or you can just buy a true and square action to begin with, prices start at $1,000. Then the action and barrel need to be bedded in a way that provides a rigid interface with a large bearing surface between the stock and action while leaving the barrel free floated.

I've built one 6.5 Grendel that is capable of .25 MOA over a wide range of conditions and several that are capable of .5 MOA. The .25 MOA rig is a Stolle Panda Action with a Krieger barrel turned and chambered by Speedy Gonzalez (Bench Rest Hall of Fame) and set into a McMillan Anshutz Prone stock. It has a Timmney 2oz trigger and a Leupold 36 X bench rest scope. I've shot several groups with it that just make the hole get darker with each successive shot. And I've won a few matches with it.

I once put some pics up of it on the forum, but I believe it was before the great crash so here are a few pics to help you get the general idea.



And this is one of my winning targets, not from a bench, but fired prone, no support except a sling.