Feed Problems with my Hatsan Flash QE .22

I Like this gun a lot compared to my Benjamin Titan springer. I am having some trouble getting the magazines to feed reliably. They seem to jam where I have to repeatedly try to stuff the pellet into the barrel with the bolt. I've used the following, and they both have similar issues:

H&N Sniper Light Domed Airgun Pellets .22/14 Grains

H&N Baracuda Hunter Extreme Hollowpoint Airgun Pellets .22/19.09 Grains

Is there a fine-tuning to the magazines I can do? To the neck of the barrel? Any other ideas? A different pellet? I'm hunting iguana at 20-50 yards. The lighter ones do the job pretty well, not sure I need the heavier round.

Ideas? Thanks.
 
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This is 30 shots with 3 different pellets, the low ones were all Crossman 10.5

I have the Pup QE in 177 and it was driving me crazy!

I have the black mags, red mags (newer and thanks Hatsan for sending them to me free of charge) and even ordered an aluminum Bullmaster mag from Ebay and had constant change of POI with all of them and very pellet fussy.

Took it out Sat and decided to try some testing with the single shot tray and OMG this this is crazy accurate. At 40 yards with JSB heavy, AA heavy, HN Bar Match and even JSB 8.44 it is under a half inch with ease (very calm day), at 18 to 19 fpe.

I do notice that the bolt is very loose fitting in mine and may have something to do with the loading of a pellet with the mags, my other, but more expense, pcps have a very tight fitting bolt.

If I want to plink I will shoot with the Bullmaster mag and be fine, but If I am looking to really get it tight, the single shot is the only way to go and I have no problem with that.

Some may not like to shoot with the Single shot, but I have no issues with it when I want the best accuracy and I went from I am selling this stupid thing to I love it.