john in jax
New member
I am not a great shot, but I am a lot better than I thought I was.
Up until this year all my scoped rifles had see-thru scope mounts, you know, just in case one walks out right at your feet. Well at the range last week I discovered something - - they destroy any chance I have at a decent group.
At 100 yards:
Ruger Mini-30 Ranch with stock rings and a 3x9 yielded 1" groups.
Ruger M77 MKII with stock rings a 3x9 yielded 1/2" groups.
Remington 7400 with (high) see-thru mounts and a 3x9 yielded 4" groups.
A guy at the range said it was all me! And he proved it to me. He had a fancy vice/strap rest that you could immobilize your gun in. When straped in and clamped down the 7400 yielded just under a 3/4" group.
Here is what he told me and I can't find any flaws in his reasoning. A low mounted scope allows you to rest your CHEEK on the stock which keeps your head/eye in basically the same position every shot. A high mounted scope (i.e. see-thru mounts) means you are resting your JAW on the stock and it is much easier for you to tilt your head just a fraction of an inch just slightly changing your perspective BUT seriously affecting the P.O.I.
I tested his theory with one of those laser bore sighters and with those high mounts just tilting my head what seemed like a 1/16" made a big difference in where the red dot was. The rifle was pretty well sandbagged so I am almost certain it was tiny/miniscule amount my head was moving that was making the red dot dance.
Up until this year all my scoped rifles had see-thru scope mounts, you know, just in case one walks out right at your feet. Well at the range last week I discovered something - - they destroy any chance I have at a decent group.
At 100 yards:
Ruger Mini-30 Ranch with stock rings and a 3x9 yielded 1" groups.
Ruger M77 MKII with stock rings a 3x9 yielded 1/2" groups.
Remington 7400 with (high) see-thru mounts and a 3x9 yielded 4" groups.
A guy at the range said it was all me! And he proved it to me. He had a fancy vice/strap rest that you could immobilize your gun in. When straped in and clamped down the 7400 yielded just under a 3/4" group.
Here is what he told me and I can't find any flaws in his reasoning. A low mounted scope allows you to rest your CHEEK on the stock which keeps your head/eye in basically the same position every shot. A high mounted scope (i.e. see-thru mounts) means you are resting your JAW on the stock and it is much easier for you to tilt your head just a fraction of an inch just slightly changing your perspective BUT seriously affecting the P.O.I.
I tested his theory with one of those laser bore sighters and with those high mounts just tilting my head what seemed like a 1/16" made a big difference in where the red dot was. The rifle was pretty well sandbagged so I am almost certain it was tiny/miniscule amount my head was moving that was making the red dot dance.