BOLT MODS FOR SAVAGE F/TR BUILD

[memilanuk]

5) Primary Extraction... Per the instructions, I should have “between .008” and .014” between the bolt handle and the back of the action rear bridge”. I’m measuring .045”. Am I looking at getting my bolt milled?

Way easier to shim the rear baffle, or have it drilled-n-tapped for blind set screws. The bolt body is supposed to be pretty hard, i.e. require carbide tooling to do the milling work on it.

Get some shim stock and play with it between the rear baffle and the back face of the receiver, before you jump into anything else prematurely. It mainly affects your primary extraction, more so than the actual bolt lift.

 

[Mike99-123]

Way easier to shim the rear baffle, or have it drilled-n-tapped for blind set screws. The bolt body is supposed to be pretty hard, i.e. require carbide tooling to do the milling work on it.

Get some shim stock and play with it between the rear baffle and the back face of the receiver, before you jump into anything else prematurely. It mainly affects your primary extraction, more so than the actual bolt lift.

I like the shim idea much better than the milling. Thanks

 

[Mike99-123]

Way easier to shim the rear baffle, or have it drilled-n-tapped for blind set screws. The bolt body is supposed to be pretty hard, i.e. require carbide tooling to do the milling work on it.

Get some shim stock and play with it between the rear baffle and the back face of the receiver, before you jump into anything else prematurely. It mainly affects your primary extraction, more so than the actual bolt lift.

Ok, so i’m Researching shim material and should be able to come up with something I can use. I’m looking at some .032” flat stock. How do you trim this and how do you bond this to the front side of the baffle? If I use epoxy, I might have to go thinner on the shim material thickness.

 

[memilanuk]

Initially I'd just try them loose to see if it makes any difference. Basically what you are doing is pushing the rear baffle back to effectively 'adjust' the timing between the ramp on the rear baffle and the corresponding surface on the bolt handle. Both being mass-produced parts, the fit between them is often... sub optimal. Many times people never even notice, until they start running hot loads, whether factory ammo or hand loads. Its one of those things where 'fixing' a problem before it is actually a problem... may cause other problems!

 

[Mike99-123]

Copy that. I hope to have it assembled in 3 weeks and then start load development. I think i’ve done enough for now with the bolt lift issue. Big improvement from where I started. Thanks again for everyone’s help!