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February 20, 2002, 02:20 AM | #1 |
Senior Member
Join Date: July 12, 2000
Posts: 141
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question regarding 870 express mag
I just purchase an used 870 remington express mag. I'm now currently looking for a shorter barrel as this 870 came with a 29 inch barrel. The barrel the 870 came with says "use 2.75 or 3 inch shells in mag recievers, use only 2.75 in all others." Now my question is I found a barrel that is marked 2.75 inch shells. So I would think that with that barrel I would not be able to shot 3 inch shells through this shotgun any more. I'm not sure if I am correct in assuming this.
Since I was curious how much the barrel affects the chamber I took the 870 out to take a look. When I look at the reciever it seems like the barrel does not impact the the size of the shell in the reciever. So I'm wondering if I were to purchase this barrel would I still be able to use 3 inch shells since this is a mag reciever or would the barrel make it so that I couldn't use 3 inch shells? Thanks in advance, UltimaSE |
February 20, 2002, 05:29 AM | #2 |
Staff In Memoriam
Join Date: October 13, 1999
Location: Columbia, Md, USA
Posts: 8,811
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Use 3" or shorter shells in a bbl and receiver so marked. Shooting 3" shells in a 2 3/4" chamber may cause this 870 to emulate a grenade, or to develop headspace probs much, much sooner than it would otherwise.
Were you planning on using the short bbl for H/D? If so, you're under no serious constraint limiting yourself to 2 3/4" shells. |
February 20, 2002, 06:14 AM | #3 |
Senior Member
Join Date: July 12, 2000
Posts: 141
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I figured as much, is the same problem true for using a barrel marked 3 inch and using 2.75 shells?
UltimaSE |
February 20, 2002, 07:04 AM | #4 |
Staff In Memoriam
Join Date: October 13, 1999
Location: Columbia, Md, USA
Posts: 8,811
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You can use shorter but not longer ones. A 3 1/2" chambered 12 ga will take all common 12 ga ammo, down to the old Brit 2" dwarf loads.
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February 20, 2002, 07:40 AM | #5 |
Staff Alumnus
Join Date: May 2, 1999
Location: South Carolina
Posts: 3,611
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Ultima, you can go down bit not up. 2 3/4 in a 3 inch chamber is fine, 3 inch shell in a 2 3/4 chamber raises pressues excessive amounts. The 3 inch will chamber, but when fired the mouth of the 3 inch case protrudes into the barrel and constricts the shot, hence increaseing chamber pressures dramaticly.
Other than (perhaps) waterfowl, no need for the 3 inch round. Giz
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