What is the going rate to "HAND LAPP" a Marlin rifle
Why? You can very easily either hand lap or firelap. We can tell you how if you wish. And doing a search will get you several great threads on firelapping.
MO Member #77
Tell me how............I wish?
Well...this is a crude method but it does some good (quite a bit actually...especially on new barrels)
Get you some Remington 40x bore cleaner and follow the instructions on the bottle... go through the whole procedure about 10 times.
Remington 40x is a mild abrasive suspended in liquid and it will remove most of the nicks and burrs left from the rifling process.
I've heard some say JB bore paste also works...but I haven't used it. I have used the Remington 40x to smooth up a new barrel many times, the stuff is too harsh for regular cleaning in my opinion.
My new 1895 was leading something terrible when I first got it...40x smoothed it right up.
Oh...almost forgot...shoot at least 2 boxes of jacketed bullets through it first, that also will take out some of the nicks and burrs.
That sounds like polishing not "hand lapping". How to hand lapp please?
From Lilja barrels – This is hand lapping and how it’s done.Originally Posted by jhaffner202
click on the link or scroll down.
FWIW, I have never hand lapped a barrel, but I have lapped some gauges and so on, and it is really easy to develop a small bell mouth at the ends of the bore. The Lilja writeup doesn't mention it, but at least some other barrel makers have a last step of 'cut a few inches off the barrel to remove the bell mouth'. Lilja may do that too, or may have a way to prevent it.
Anyway, food for thought. If anyone has hand lapped a barrel, I'd love to hear the results. If I ever come across a discard barrel I'll have to try it and see - but I ended up firelapping my own barrels. That works, if done carefully (I used the procedure in Beartooth's book).
whomever - go back to the link and look at the next question…”Why do Lilja bbls have a band saw cut on the muzzle end”…Originally Posted by whomever
This whole page is filled with good stuff, as is the rest of Dan’s site…
I have never hand lapped a barrel – and the reason is simple; I do not have the instruments necessary to accurately measure the inside of a deep hole…
I have firelapped many rifles – with good results though…
Lapping is polishing...Originally Posted by jhaffner202
Lapping: a : to dress, smooth, or polish (as a metal surface) to a high degree of refinement or accuracy
Polishing: To make smooth and shiny by rubbing or chemical action.
whomever - go back to the link and look at the next question…”Why do Lilja bbls have a band saw cut on the muzzle end”…
Ooops, stopped reading too soon :-), thx!
Lapping is polishing...
In machinist parlance, they are different. Lapping is an abrasive embedded in a soft (lead, brass, cast iron) lap used for precision dimensioning. Polishing is using abrasive paper or a rag and polish to change the appearance, but it's not about dimensioning; polishing makes things prettier but not straighter/flatter/more accurately sized.
So I think machinists use a different definition than the general one.