Shims Or No shims????

[93klauss]

So reading posts, There are suggestions to tune lv ten bolt without shims. While others suggest it.

Who has it right??

[kcombs9]

I start with out shims when tuning the carrier, then I test how the bolt reacts to a squeegee in the breach, if it wont reset then you add shims.

[athomas]

Tune without any shims. Shims do not affect the overall operation of the level 10 and can cause the vent hole to be too close to the oring. This can cause leaks that act like a carrier that is too loose. If you then use a tighter carrier, you will get bolt stick issues thinking that you have the proper size carrier when if fact you have a carrier that is too small.

Shims only affect how far the bolt has to move before it can vent air and reset. Each shim is only 0.01" thick. Adding two shims moves the oring sealing point 0.02" closer to the the vent hole. Even if you have a breach blockage, if the bolt moves far enough to get past the sear, it will always move farther than the thickness of a couple of shims. Therefore, you should never need shims installed.