SDW,
If you can't see the wear in your other bolts they are either differently finished or evenly worn by the time you inspected them closely.
To be clear, I am not suggestion you should skip the squaring of the receiver when that lapping tool turns up. It could improve things and it certainly won't hurt it. It's also peace of mind. If I had one I'd use it on every build.
I tried gluing once to see for myself but it made no improvement to group sizes. I used Loktite 641 and it came apart easily (which it is designed to do). The join was tight to start with and the receiver a billet so I don't think it was fair to expect much better. Again, to be fair I can see how gluing might help in a sloppy fit and don't doubt the other guys who say their group sizes shrunk. If this were me however and the join a sloppy fit I would trade the upper for a better one. Uppers don't cost much relative to the rest of the gun, especially when you think you might halve your group size.
Here's a thread on the subject
http://www.65grendel.com/forum/showthrea...r-receiver
If you can't see the wear in your other bolts they are either differently finished or evenly worn by the time you inspected them closely.
To be clear, I am not suggestion you should skip the squaring of the receiver when that lapping tool turns up. It could improve things and it certainly won't hurt it. It's also peace of mind. If I had one I'd use it on every build.
I tried gluing once to see for myself but it made no improvement to group sizes. I used Loktite 641 and it came apart easily (which it is designed to do). The join was tight to start with and the receiver a billet so I don't think it was fair to expect much better. Again, to be fair I can see how gluing might help in a sloppy fit and don't doubt the other guys who say their group sizes shrunk. If this were me however and the join a sloppy fit I would trade the upper for a better one. Uppers don't cost much relative to the rest of the gun, especially when you think you might halve your group size.
Here's a thread on the subject
http://www.65grendel.com/forum/showthrea...r-receiver