Is it true that a Remington 870 20 gauge barrel is the same as a Remington 58 20 gauge barrel with the exception of two gas ports? If so, does it matter if the 870 barrel is LW or standard weight? If an 870 barrel was available, who drills the holes for use on a 58?
This with a SLIGHT exception. The 58 barrels were all 2 piece, the locking lug cutout section was screwed onto the barrel. Some of the early 870 barrels are like this as well, most will be one piece. Doesn't really make a difference, just mention it for educational purposes.
texasbilly said:
Does anyone know the specifications for drilling the gas ports? Location? Diameter of the holes? Angle of the holes?
You will need an existing barrel to take measurements off of, I'm not aware of any specs out there unless someone takes them off a barrel they already have. It really should be done in a jig, certainly not freehand. It could probably be done in a mill, but even that would be tricky at best. Dave Snoap in MI has the jig, and advertises the service on ebay, i think its about 50 bucks.
What I have for Model 58 20 gauge.
28" & 30" - 2 ports 0.1285" #30
26" - 2 ports 0.136" #29
You will need an existing barrel to match the angles. No data I have seen except one source says it is the same angle as an 1100.
I have seen the ports both ways actually. One friend's 20 had one port on the bottom and another's had them split like an 1100. First friend's Dad's 12 gauge had them split and that made us curious so we checked the other one. I had forgotten that.
This pic shows what I'm referring to. One port on the centerline of the magazine (therefore on the centerline of the barrel), one to the right of center. 1100/1187 barrels have the gas ports equidistant from a centerline down the barrel.
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