Video inside a rifle bore. See any issues?



This gun wouldn't shoot at all. Nothing consistent. Barrel was warrantied but I wanted to look inside. Anyone see anything?


Have you tied putting a new white patch just inside the opposite end before inserting your scope. With a end scope I found it reflects light back at you providing a much better picture.
 
It's o.k. to lap after the barrel has been chambered? I was under the impression that the lapping should only be before chambering. Thanks for the insights.
Don't know how it can properly be done without at least some lapping after, particularly the first few inches beyond the chamber because new burring is happening.

If I see any roughness in the chamber I lap/polish it as well by drilling out a primer pocket dead center with a bit matching the expanded neck.

Insert rod the same diameter if at all possible or just use more epoxy to center and seal it.while filling the case.

put that on a drill dip it in lapping compound, insert and spin slightly moving it back and forth just barely to allow the compound and any brass or steel to escape.

spin time length based on how rough and how quickly it polishes, cleaning and checking frequently and in between seat and remove clean once fired bras looking for gouges, dings, rings etc indicating burrs.

It won't fix a major problem but it's a way to gently work on minor problems without the risk of making them worse.

I've saved a few chambers I thought were going to have to be re reamed. that way.

Reading this may make some gunsmiths cringe but it works for me.
 
I use the brake cleaner and starting fluid as degreasers only. Both stink, so I use them outside the shop door. Using them indoors could damage your lungs?
 
If I see any roughness in the chamber I lap/polish it as well by drilling out a primer pocket dead center with a bit matching the expanded neck.

Insert rod the same diameter if at all possible or just use more epoxy to center and seal it.while filling the case.

put that on a drill dip it in lapping compound, insert and spin slightly moving it back and forth just barely to allow the compound and any brass or steel to escape.

spin time length based on how rough and how quickly it polishes, cleaning and checking frequently and in between seat and remove clean once fired bras looking for gouges, dings, rings etc indicating burrs

When your drilling out the primer pocket is it to match the OD or ID of the fired case. Nor sure I have a clear picture of your process yet. Are you using the fired case as a guide only? Or just fine polishing the neck chamber area and throat.
 
You might try to fire-lap the barrel using the David Tubb "FINAL FINISH" bullets that can be ordered from his company , Superior Shooting Systems .
You buy a kit containing bullets coated with 5 different levels of lapping compound , starting with coarse and ending with very fine grit . You reload them into your cartridges , at the starting load recommendation from any reloading manual . Lowest starting velocity .
I have used these on 4 different rifles that had very rough bores , and all 4 ended up very smoothly polished , cleaned easily , and shot tighter groups .

It might be worth a try if you get no satisfactory resolution of your talks with gunsmith and barrel manufacturer .
Good luck .

DMP25-06
 
When your drilling out the primer pocket is it to match the OD or ID of the fired case. Nor sure I have a clear picture of your process yet. Are you using the fired case as a guide only? Or just fine polishing the neck chamber area and throat.

I was doing it because I was using a 1/4" rod as a stem/driver.

I have soldered them in before but just using epoxy works well and is easier.

Once I have it, secured I use a brush to spread lapping compound on it, slide it into the chamber mounted on the drill spinning it on fast and very slowly working it back and forth maybe a few thousandths.

I've fixed some fairly rough chambers that way in the past.
 
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