Strange Hawke issue.

Curious if anyone else has ever experienced this. I mounted an Airmax 6-24×50 That had been on my TX for about 5 months. Won a couple matches with it. I took it off about 4 months ago because I wanted a dot reticle so I replaced it with a Sightron STac. I pulled the Airmax out of the gun safe and mounted it on my recently purchased LGU. I found the parallax knob almost impossible to move and it would not adjust. Now 2 days later I was putting it in the box to return and much to my surprise I found the parallel knob moves freely and works as designed. Crazy.
 
Curious if anyone else has ever experienced this. I mounted an Airmax 6-24×50 That had been on my TX for about 5 months. Won a couple matches with it. I took it off about 4 months ago because I wanted a dot reticle so I replaced it with a Sightron STac. I pulled the Airmax out of the gun safe and mounted it on my recently purchased LGU. I found the parallax knob almost impossible to move and it would not adjust. Now 2 days later I was putting it in the box to return and much to my surprise I found the parallel knob moves freely and works as designed. Crazy.

This likely has something to do with one of the rails being slightly different than the other. Assuming that the rings were secured on to the rail, then the scope was secured onto the rings. It could be causing some toque on the scopes tube that is restricting movement inside.

Also make sure that you’re using a torque wrench to ensure that you’re not exceeding the manufacturer’s specs.
 
Curious if anyone else has ever experienced this. I mounted an Airmax 6-24×50 That had been on my TX for about 5 months. Won a couple matches with it. I took it off about 4 months ago because I wanted a dot reticle so I replaced it with a Sightron STac. I pulled the Airmax out of the gun safe and mounted it on my recently purchased LGU. I found the parallax knob almost impossible to move and it would not adjust. Now 2 days later I was putting it in the box to return and much to my surprise I found the parallel knob moves freely and works as designed. Crazy.
Yep, had the same issue 2 times. Your ring is too close to the turret housing causing the adjuster to bind. You can loosen it until it adjusts properly or better yet relocate it at least a 1/2" away from the housing. Cheers, Bill and Addi.
 
My dealer traded me for a Sidewinder . My wife's D75 has a Sidewinder that has been on multiple rifles with zero problems. So I moved up. I just wish they had a reticle with a floating dot and not all the Christmas tree decoration in it. If they did my 4 Sightron STacs might have been Sidewinders but the Stacs have been great. This time though I want more than 20x. Those tiny 10 rings on some of the targets are tough on 20x for old eyes.
 
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This likely has something to do with one of the rails being slightly different than the other. Assuming that the rings were secured on to the rail, then the scope was secured onto the rings. It could be causing some toque on the scopes tube that is restricting movement inside.

Also make sure that you’re using a torque wrench to ensure that you’re not exceeding the manufacturer’s specs.
EXACTLY, I had a Vortex Golden Eagle that wasn't working correctly. Sent it in, and come to find out I had tightened the rings to tight...Vortex replaced the scope, told me what I had done, bought a torque wrench and have never had another issue. But I know I have been overtightening them for years. 18 inch pounds max, just doesn't seem tight enough😆
 
This likely has something to do with one of the rails being slightly different than the other. Assuming that the rings were secured on to the rail, then the scope was secured onto the rings. It could be causing some toque on the scopes tube that is restricting movement inside.

Also make sure that you’re using a torque wrench to ensure that you’re not exceeding the manufacturer’s specs.
Thanks for the tip about differences in rails. I never thought of that. If I ever do a switch like this again I will loosen the ring screws then retorque.