Please refer to the table below...having had a g44 since feb, have run many brands of ammo thru it, glock says to use only 40gr ammo, no dice, mine only works on Remington golden bullets, have 3 other glocks not happy with this one, waiting for recall
Note that the 'full power' Remington cartridges generated some of the highest bullet speeds of the test group.
Also, as I recall, the same Remington cartridges generated a rather noticeable muzzle flash... which means they're loaded with slightly more of a slower powder... which stretches out the recoil impulse... which helps cycle the pistol (especially, a 'marginal' pistol).
In my opinion, your pistol is suffering from 'excessive slide drag', as presented here...
Glock 44, post #131
... or an extremely 'leaky' fluted chamber...
Glock 44, post #109
... or both.