TiRant 45 Owners:

[J]

Have any of you run your TiRant 45 on a 9mm host?

I got the 1/2x28 piston and threaded barrel for my full size M&P VTAC 9mm. It refuses to cycle at all on factory 115gr ammo. Maybe 10-20% stove pipe, the other 80-90% don't even cycle back far enough to stove pipe, the empty brass just stays in the chamber and requires a manual cycle.

Does the booster spring need to be replaced? Does it need heaftier ammo? Does the gun need a weaker recoil spring? Does it just need more break in (suppressor is brand new, gun is well broken in)? Will it not work at all? I was under the impression the TiRant45 should still work on 9mm.

Let me know your thoughts and experiences.

[Irving]

Have you looked up the weight of the TiRant45 compared to the TiRant9 (if there is one)?

[J]

Yes, it is 2.9oz heavier. But the fact that specific pistons are offered for the TiRant45 in 9mm, and the general internet reports lead me to believe it should be possible.

Additionally, the lower end (steel instead of titanium) Evolution 9mm from AAC is only 1.8oz lighter. Factor in something like a YHM 9mm Cobra (all steel), and the higher end TiRant 45 is the exact same weight. So I don't think it is purely a weight issue.

That said, the other units may have a weaker booster spring in them to account for the extra weight, or something similar. So perhaps someone knows if they make a lower power booster spring, etc.

[Irving]

That doesn't seem like too much more. I was just trying to establish a baseline.

[J]

Added some more stats too. Because it is a higher end can, it is actually still really light weight even though it is a 45 can.

[Great-Kazoo]

Recoil springs. Touch bases with johnny ego, he did some different recoil springs for function.

[J]

Got an update back from AAC. They say that it is common with a new threaded aftermarket barrel. Break in the new barrel well for 150-200 rounds and it should rock and roll. Will report back after this terrible manual labor of shooting my gun.

[Hoser]

Dump some oil in the booster spring area and run it.

My Evo did the same thing.

[Irving]

What exactly changes about the barrel in 150-200 rounds? I've always wondered what it meant to break in a barrel.

[J]

The locking surfaces smooth out, or so they say. It is locking up too tightly right now, so most of the energy is absorbed trying to get the barrel to come free from locking surfaces, rather than cycling powerfully enough to lift the extra weight of the can.

I'll give hoser's suggestion a try too.

[RANGERRON72]

FWIW, try 147 gr Subsonic military ammo as issued to military and gov agencies..........or load your own. Heavier bullet, slower pressure build, may just do the trick. Just speculating, let us know if this works...........

[DuckTape&550Cord]

I have a TiRant .45 and have ran it on my Glock 19 using a Lone Wolf barrel. New barrel and no issues. The POI shift however is very apparent with the 9mm. The 1911 however is dead-on accurate out to 100 yds.

[J]

After lubing the piston, then breaking in the pistons and barrels by manually cycling it for about another 50 rounds (100-150 total).... It now works perfectly on 9mm, 40SW and 45ACP.

No notable POI shift on any of them.

[DuckTape&550Cord]

I just bought a 19lbs recoil spring for my G19 since it was not as nearly as quiet as the 1911. The stock recoil spring is 18 lbs and the 19lbs is supposed to keep the action locked-up for a micro-second to keep the gasses contained. I'll post up my findings after a range day this weekend.