Rifle Scopes how tight? - base & rings

[muscles]

rifle is savage 338 lapua fcp hs.

my vortex viper pst 6-24x50 ffp showed up today along with low seekins rings (thx primary arms).

i ordered a murphy precision 30 moa base on sunday. in speaking with murphy precision, the base would ship tuesday, so it should be here within a few days.

I'm going to buy a torque wrench. how many lbs should the 4 base screws be? how bout the ring screws to the base, and the ring screws?

i'd appreciate your input. thx.

 

[Rob01]

Re: how tight? - base & rings

http://badgerordnance.com/wp-content/uploads/downloads/2011/10/Mounting-rings-and-bases.pdf

 

[kenndapp]

Re: how tight? - base & rings

is there a rule of thumb for tightening all basses and rings? or are all manufactures different in the amount of force needed?

 

[KE5MUJ]

Re: how tight? - base & rings

Go with manufacturers specs

 

[jtv3062]

Re: how tight? - base & rings

Should've ask Murphy

 

[muscles]

Re: how tight? - base & rings

i read the badger link. thx. didn't realize it was manufacturer specific. ill call murphys and seekins.

 

[Beef82]

Re: how tight? - base & rings

Base screws and cap screws are generally 15-20in/ibs, if the crossbolts are picatinny spec they'll take 65in/lbs, if not they might not.

 

[cdmurphy]

Re: how tight? - base & rings

Muscles,

For the #8-40 screws on your base, we recommend a maximum of 20 in-lbs. If you're going to use loctite (recommended) I would stick to 18 in-lbs.

 

[kombar]

Re: how tight? - base & rings

If you're going to go through the trouble of buying a torque wrench for this project, you should also pick up a tap to clean out the factory threads. Variances in thread and collar friction will result in different preloads being applied to the screws, regardless of what the torque wrench says.

Basically, if the threads are clean, you'll get more clamping force out of a screw for a given torque value.

 

[jtv3062]

Re: how tight? - base & rings

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: muscles</div><div class="ubbcode-body">i read the badger link. thx. didn't realize it was manufacturer specific. ill call murphys and seekins. </div></div>

Never mind Murphy contacted you.