Backboring Barrels on a Parker Brothers Shotgun

Backboring refers to a process where a shotgun barrel is reamed out to remove excessive pitting. Larry Potterfield, CEO and Founder of MidwayUSA, takes the viewers through this interesting process using a set of reamers, T-handle, and a set of Parker shotgun barrels. This process, while time consuming and messy, is absolutely necessary when restoring an older shotgun that has excessive pitting in the bores. The process starts by threading a reamer onto a Baker T-handle. The reamer and bore are then oiled and the reamer is inserted into the bore. Turning the reamer clockwise, it is pushed through the barrel. The reamer is removed and the chip brushed away at regular intervals. The reamer is worked through the barrel until it is flush with the muzzle.

Category:

Howto & Style

Tags:

• MidwayUSA
• Larry
• Potterfield
• gunsmith
• shooting
• gun
• firearm
• gun-restoration
• guntec
• side-by-side
• shotgun

[brandeno15]

its what happens when you dont take care of your gun keeping it in your closet is not good

[stoobers1]

Yes, the barrel is larger in diameter.

Maybe the gas will escape, but probably not. Shotgun shells have a "wad" between the powder and the shot. The wad is like a little cup, and the wad is what keeps the gas from rushing past the shot. The plastic wad expands to fill the barrel, like base of an expanding bullet.

Trimming 2 or 3 thousands of an inch from a barrel probably won't affect the plastic wad. Of course, the barrel might explode...

Just my 2 cents.

[1979aerocaprice]

Shotguns are often "backbored", meaning that most of the bore (from the forcing cone to the choke) is slightly larger. This is claimed to reduce felt recoil and improve patterning. The recoil reduction is due to the larger bore producing a slower acceleration of the shot, and the patterning due to the larger muzzle diameter for the same choke constriction, which results in less shot deformation. Some also claim increased velocity with overbored barrels, due to larger swept volume of the barrel.

[meetsouder]

would a shotgun pit inside the barrel because of the bbs being shot out? ive never owned a gun... or shot one :( so im kinda new to this.

[matema7ico]

1 ppl got your asshole backbored

[impaxNo7]

A 12 bore is normally .729".

Mr Potterfield is using reamers up to .769", a significant widening of the bore.

Although this will reduce barrel pressure it is unsafe to use without reproof.

It is illegal to sell a weapon modified like this in Britain without reproof.

It would probably be designated as an 11 bore.

Firing any cartridge that does not have a plastic shot cup is likely to promote welding of the shot into lumps. Lumps like this travel a long way when fired upwards.

[bluejay148]

that will come in handy how much is that 

[AudioGardenSlave123]

@SymAmineC8H11N if you do you would also have to re rifle the barrel, and doing this will lessen the guns power and accuracy, because the gases will be able to get passed the bullet more so its not the best thing to do, kill self justing bieber

[AudioGardenSlave123]

only not taking care of a gun will let the gun get in a shape where this would be needed, if you put work into cleaning a gun well, you wont have to worry bout ever having to do this

[kawakz900]

@elanlover94 see BRILEY

[SymAmineC8H11N]

curious,can you backbore a rifle??

[SymAmineC8H11N]

@elanlover94 possibly a pipe threader