Ok, of course that is not the way. Plastic shim is not how it’s done.Yes, a 140 grain. Bulk box, rounds loose, not ideal either.
Was in the 1 moa ballpark. What bugged me is all that sighting, probably 80 rounds, pretty consistently around there minus a few fliers, but never really a 3 shot group under that. Had a buddy, a better shot than I usually, two targets, nothing tighter produced.
Same conditions, my 7.62, first 3 shots I had 2 touching and it was like that for about half the 3 shot groups. Yeah that rifle is very good for no reason i can cite. Maybe with good ammo and things converge between the rifles with the 7.62 seeing a more marginal change and the 6.5 getting tight. It wasn't sloppy just expected similar results.
Ok - I'll take that advice, hold, save $160, take it apart and re-fit, probably the sensible thing to do. I believe I torqued it on the low end, I want to say 40 lbs. One thing on the M5s, haven't found a good vice block - not happy with versions that basically put all the stress on the lugs. I clamp the reciever in a vice, using a plastic shim to protect it. Feels ok but I'm very anxious to carefully torque them and get them out of the vice. Wish Aero sold a vice block for the larger recievers, for AR15 stuff those clamshell style blocks are great - very positively locked and kept true during the torqueing process.
Get this one:
Wheeler Delta Series Upper Receiver Action Block & Picatinny Rail Vise
The Wheeler Engineering Delta Series Vise Block is an innovative and versatile tool that is designed for compatibility with almost any AR-15, AR-10 or...
www.midwayusa.com
this one goes around the upper, and you press it in vise so walls of the block press into the upper and hold it all together . Then you torque it to 80-90, not 40.
I highly recommend getting a lapping tool too and prepare receiver mating edge properly every time you move barrel in/out. a correct part # is 1082227 (AR-10).
Amazon product ASIN B0779BNQ8KView: https://www.amazon.com/Wheeler-Receiver-Gunsmithing-Cleaning-Maintenance/dp/B0779BNQ8K
always have upper mounted strictly vertically, apply the grit, then do 5 clockwise and 5 counter clockwise turns by hand. never use drill, on a new upper at least, all you need is to take off a very fine amount of paint and finish from the edge to make mating surface uniform.
and do not forget to grease the threads before torqueing the nut.
Amazon product ASIN B01GGQMF54View: https://www.amazon.com/gp/product/B01GGQMF54
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