I had my 3rd range inservice for the year, and even though I was using the issued Glock for the majority of the shooting, I saw a marked improvement in my accuracy at 25 yards to 50 yards. I was able to shoot more intuitively despite the different platform, so dry fire practice does have benefits beyond the particular weapon platform you are practicing with. I still did not shoot as well as I do with my Sig, but that's a given for me at this point. Today I tried to really concentrate on why, and I think a lot of it boils down to the pistol grip. The fatty Glock grip just doesn't let me feel like I have a good purchase with my support hand, making me squeeze to hard with my strong hand, pushing rounds left. When I combat that, I can bring them back center. Sights are also a limiting factor, I really like having a different color up front as it allows both eyes open shooting to be easier and more accurate, as well as faster to acquire.