I do not kow if gloves would help. I am not 100% sure that torque is the problem, but it never hurts to try cheap fixes like gloves or changing the way you grip the gun.

Try shooting from a padded rest that is shaped like a "V" and do not let the grip or frame touch the rest, just the barrel

When I use gloves, I like the soft deer skin (work) gloves. A cheap pair from your local hardware store would work. Try those before you spend mega bucks on shooting gloves.

Let someone else shoot it and see if they experience the same problem.

By the way when I flinch shot go low & left for me.

That is strange to have that much change in the windage. One thing that can cause it is putting your trigger finger all the way in the guard instead of just putting the meat of your finger tip on the trigger. My friend shoots to the left all the time for this reason because he has short, stubby fingers and his finger lays on the frame. I shoot all of his guns to the right. The difference between us is almost 12".
It is also common to have a change in windage by switching bullets. You do not mention the load you are using with the 300 XTP. The twist and direction of twist can do this with the wrong velocity for a given bullet. I would try loading from mild to hot to see what changes occur. Let us know what happens.

You don't mention whether this is occuring at the bench or from field positions. I shoot from the bench with forearms rested on the bags but the gun - especially the butt - completely unsupported so as to not collide with anything during recoil. If the pistol is torquing in your hand then hitting the bench or your rest no telling where the bullets will go.

If this group shift is happening from field positions - standing, sitting, kneeling, or rollover prone -then it is a better mystery but be careful of your hand placement as you take your grip. This year I'm planning to blood my S&W 629 Mtn Gun but other years my pistol is a Bisley Blackhawk 45 Colt. I train with 255 SWC @ around 900 and hunt with 325-335 grain LBTs @ 1200 or so and have only to fine tune the elevation come November. Good hunting!

It certainly could be due to gun torque. I hadn't thought of that. Usually when I flinch, I know it (and shots go low rather than in a group off to the left of the paper) It was just so weird that I've sighted in the gun for these same loads and bullets before and saw the same thing. The 250's I was using had a much sharper snap to the recoil. It was really a noticeable characteristic of those loads - but they were very nicely centered on the target with the rear sight right in the middle of the frame.

Gun should have been clean enough. No muzzle damage as I am looking at it now. These bullets did the same thing earlier, so I'm guessing it is a combination of my grip and the increased torque of the heavier bullets. Would shooting gloves help stop the pistol from shifting within my grip as it goes off? Not the padded ones, just the ones with the more tacky surface. I've never used them, so I don't have any comparison info. maxman