Your powder charge is right in the ballpark but why not try loading some dummy rounds without primers or powder and just seat the bullet at varying lengths, starting with your current length and decreasing it in .05" increments. Load up three or four of each and try to feed them from the magazine by racking the slide. Once you find a length that your pistol likes, then play with the length in .02" increments until you find the perfect length. It shouldn't take more than a few minutes. Once you finish make sure and break those dummy rounds down.
And have you tried the drop test yet - dropping a loaded round into the barrel, after you remove it from your Glock of course, and see if it falls into the barrel freely?
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