laissezfirearm
New member
Bought a case and did more testing this afternoon.
From a Modified choke tube, keyholing appears to begin at about the 60 yard mark.
From an Improved Cylinder, 70 yards.
From an unchoked, approximately 90 yards.
Note: By "begin", I mean that there is a noticeable gray smudge on the target left by what I'm assuming is the attached plastic wad (looks sort of like a penny and a dime standing side-by-side on their rims). Once keyholing begins, grouping degrades noticeably within 10 yards as it increases -- although I have not yet seen evidence of a full 90 degree yaw, probably due to residual weathercocking.
Note 2: Attached wad slugs appear to be much more prone to choke sensitivity than Fosters. I've regularly gotten 4-6" 100 yard groups with a scoped 870 with a Mod tube w/Fed and Win slugs from prone or off a bench.
Also, at 25 yards from a bench:
Remington 870, 20" cantilever, 1X scope, factory Modified choke tube
Federal "Tactical" Copper-Plated 00 (45 pellets total)
Pellets in 12" Circle: 34
Pellets in 6" Circle: 19
Remington 870, 20" factory Improved Cylinder w/RS
Federal "Tactical" Copper-Plated 00 (45 pellets total)
Pellets in 12" Circle: 25
Pellets in 6" Circle: 11
From a Modified choke tube, keyholing appears to begin at about the 60 yard mark.
From an Improved Cylinder, 70 yards.
From an unchoked, approximately 90 yards.
Note: By "begin", I mean that there is a noticeable gray smudge on the target left by what I'm assuming is the attached plastic wad (looks sort of like a penny and a dime standing side-by-side on their rims). Once keyholing begins, grouping degrades noticeably within 10 yards as it increases -- although I have not yet seen evidence of a full 90 degree yaw, probably due to residual weathercocking.
Note 2: Attached wad slugs appear to be much more prone to choke sensitivity than Fosters. I've regularly gotten 4-6" 100 yard groups with a scoped 870 with a Mod tube w/Fed and Win slugs from prone or off a bench.
Also, at 25 yards from a bench:
Remington 870, 20" cantilever, 1X scope, factory Modified choke tube
Federal "Tactical" Copper-Plated 00 (45 pellets total)
Pellets in 12" Circle: 34
Pellets in 6" Circle: 19
Remington 870, 20" factory Improved Cylinder w/RS
Federal "Tactical" Copper-Plated 00 (45 pellets total)
Pellets in 12" Circle: 25
Pellets in 6" Circle: 11