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(Part 2) Does this barrel crown look ok to you?
- Thread starter starlingassn
- Start date
It’s a recipient of the head-to-toe treatment so it will be interesting to see how it fares.
1. Deburred barrel port.
2. Poured a cast lap and worked the bore into uniformity.
3. Smoothed the leade and transition into the rifling.
4. Chopped off the bad portion. Faced off in the lathe.
5. Lightly polished the bore with J-B (already smoothed by lapping).
6. Crowned.
A couple pictures of the cast lap:
1. Deburred barrel port.
2. Poured a cast lap and worked the bore into uniformity.
3. Smoothed the leade and transition into the rifling.
4. Chopped off the bad portion. Faced off in the lathe.
5. Lightly polished the bore with J-B (already smoothed by lapping).
6. Crowned.
A couple pictures of the cast lap:
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no clue yet,
as the gun and the barrel are currently about 900 miles apart lol
stay tuned though,
i have a feeling its going to be quite impressive
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I used Loctite’s Clover compound 280 grit on the cast lap. The number suggests coarse but it is a friable abrasive that breaks down into smaller particles to develop a smooth finish.
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The dial indicator showed the bore about 14 thousandths out of concentricity with the OD. It looks more significant due to the muzzle threading.
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wow, all i have ever used on cleaning up a crown (.22) or rebuilding one,
is a 4" long 10/32 screw (from a toggle bolt) with an acorn nut on the threaded end snugged down.
then apply napa's valve lapping compound to the head of the acorn nut and start dress'n up the exit hole.......
different calibers require different screw and nut sizes
is a 4" long 10/32 screw (from a toggle bolt) with an acorn nut on the threaded end snugged down.
then apply napa's valve lapping compound to the head of the acorn nut and start dress'n up the exit hole.......
different calibers require different screw and nut sizes
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I'm really happy that it got sorted out. I am working on a few barrels tomorrow as well as a couple of mine.
The "new" chaser has a crap barrel and shears off a ring of lead from the skirt when loading. The crown isn't great either.
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Brass screw worked even better than usual this time it looks like..... ;-)
Bet that'll shoot now
Bet that'll shoot now
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Yes sir, SPA has a special ability to mangle both ends of an otherwise perfectly good barrel. In your capable hands I'm sure it will turn out nicely.
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