Porting a shotgun helps decrease muzzle rise and felt recoil. I decided to port the 18.5″ barrel on my 870 Remington shotgun. This is a quick and easy project that requires minimum tooling.
I ordered the following items from Brownells:
- Barrel porting fixture (952-100-001)
- Do-Drill cutting oil (083-007-016)
- Graphite Black Cerakote (100-003-743)
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The porting kit includes a set of vise blocks to secure the barrel, an aluminum drilling fixture, a hardened drill guide and a drill bit. To port your own barrel, you just need to supply the drill.
The kit we used (kit #1) has a drilling fixture with 35 holes on each side. The supplied bushing guides a #40 drill bit (.098″). A 23 hole per side kit (kit #2) is also available, this uses a #31 drill bit (.120″).
Before you begin, I would highly suggest stocking up on a supply of drill bits to replace the bits you may dull or break.
For more on shotgun porting read Porting a shotgun barrel on milling machine