Lap the lugs in a Target action?

[mattri]

Just ordered a Target action, is there any benefit to lapping either or both lugs?

[82boy]

Just ordered a Target action, is there any benefit to lapping either or both lugs?

Nope

[Cycler]

The "floating" bolt head on Savage actions helps it to self-align so lapping the lugs isn't needed.

[mattri]

Good to know- thanks.

[dcloco]

Yes...there is. Just because the bolt head floats, does not mean the thrust face of the bolt head and the thrust surface of the action share the same plane.

Black the lugs on the bolt, shoot a round, and see how much contact there is.

[mattri]

Interesting- what's a good material to use?

[dcloco]

Sharpie to check if the operation actually needs to be done.

....and tooth paste works rather well. Plain jane toothpaste that is.

[Cycler]

Yes...there is. Just because the bolt head floats, does not mean the thrust face of the bolt head and the thrust surface of the action share the same plane.

Black the lugs on the bolt, shoot a round, and see how much contact there is.

Well, if the bolt head floats, how is lapping going to correct any mis-alignment? All it will do is smooth out the mating faces with the same degree of (mis)alignment.

[dcloco]

Yes...there is. Just because the bolt head floats, does not mean the thrust face of the bolt head and the thrust surface of the action share the same plane.

Black the lugs on the bolt, shoot a round, and see how much contact there is.

Well, if the bolt head floats, how is lapping going to correct any mis-alignment? All it will do is smooth out the mating faces with the same degree of (mis)alignment.

Correct. But, now they match and have full contact.

[davemuzz]

Correct. But, now they match and have full contact.

Now that's an interesting concept. "Full Contact Mis-Alingment". ;D :D

[snowpro440]

Short Bus?


Re: Lap the lugs in a Target action?
« Reply #9 on: Today at 11:48:50 AM » Quote

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Quote from: dcloco on Yesterday at 08:11:43 PM
Correct. But, now they match and have full contact.


Now that's an interesting concept. "Full Contact Mis-Alingment".

You cant prove your full contact-mis-alignment without a measureing tool but the bolt will deffinately open smoother. For the most part it is eliminating any ruff or un-even mating surfaces and as for mis-alignment..You dont need a pefect alignment for a floating bolthead...

[dcloco]

Short Bus?


Re: Lap the lugs in a Target action?
« Reply #9 on: Today at 11:48:50 AM » Quote

--------------------------------------------------------------------------------
Quote from: dcloco on Yesterday at 08:11:43 PM
Correct. But, now they match and have full contact.


Now that's an interesting concept. "Full Contact Mis-Alingment".

You cant prove your full contact-mis-alignment without a measureing tool but the bolt will deffinately open smoother. For the most part it is eliminating any ruff or un-even mating surfaces and as for mis-alignment..You dont need a pefect alignment for a floating bolthead...

Yes, you are correct. Could be measured, but it would be tough to do.

Blacken some of your bolt lugs with a black sharpie, let the ink dry, close the bolt on a fired case, and report back what you find.

[dcloco]

Forgot to add, which do you believe is being lapped - the chrome moly or stainless action...or the plated bolthead?

[range rat]

If the bolt is the misalignment problem and not in line with the action lugs. Lapping will only make the bolt close easier and the real problem worse. The bottom line is if the action lugs are perpendicular with the barrel, and bolt faces parallel, Don't mess with it. Draw it out on paper and you'll see what I mean.