Originally Posted by Tennessee
Originally Posted by m_stevenson
Originally Posted by Tennessee
I have not found Tikkas to have enough meat for a shoulder when threading to 5/8-24 for most common 30 cal suppressors.

I have done about 5-6 T3s now and have pressed a shoulder behind the threads on all. I have done one .223 threaded at 1/2-28 and it had plenty of meat for a sufficient shoulder.

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I would guess the "shoulder ring" is an interference fit?
If so, does it have a constriction in the bore beneath it?


I have not done a gage ball drop test but I highly doubt there is a constriction. The rifle still shoots 3 shot touching groups regularly. There was a very small shoulder after turning the area to be threaded to .625". If I recall about .020-.030 per side, so the ring has at least something to stop against. You don't need a major press fit. The ring is slip-light press fit with LocTite cylindrical bonding compound applied.

So the ideal process is to turn the muzzle OD to .625 for the proper length (desired thread length + length of shoulder ring), install shoulder, thread from muzzle to shoulder.



Thanks for the explanation, Tennessee.

.020-.030" shoulder is definitely enough to seat the ring on. So you're using 609 Locktite?

I like it. It gives more choices in thread sizes for guns with slimmer barrels.

Mark

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