What range for shooting M22

[JimF]

[QUOTE=pmclaine;454481]With my 1.75 Unertl 20X at 100 yards my adjustments are almost max'd out and I have the scope tube almost touching the top of the micrometer mount frame.

Do those shooting at longer range shim the rear mount?

[QUOTE]

How about installing either a HIGHER rear block . . . or a LOWER front?

[Parashooter]

Judging from the picture, that's a very high front block.

[pmclaine]

Don't know the history f the blocks. They were on the gun when I bought it. I'm assuming they were done at Springfield when rebuilt.

[Parashooter]

Looking around the interweb, it appears such high blocks were normal for the old Winchester scope. Given the elevation problem with the Unertl mount, a smaller front block seems a practical solution unless it results in the bolt handle smacking the tube during operation. Brownell's and others carry blocks in various heights that might have the same hole spacing and could be installed without permanent alteration.

A higher rear mount (or added shim) has the possible disadvantage of raising the line of sight uncomfortably high for good shooting position. Depends on individual physique.