View Full Version : Navy Sleeve
I'm developing a project and need some information regarding experience shooting a rifle fitted with a Navy Sleeve. I realize some jokers with no idea what a Navy Sleeve is will want to jump on this (perhaps also some who do)...
Anyway, accuracy: good, bad, so-so?
MVP
Delta-1-Bravo
07-21-2011, 09:57
deleted
The Reaper
07-21-2011, 16:38
If you are referring to the chamber adaptor for the M1 Garand to shoot 7.62x51, IIRC, they caused sufficient problems that the Navy quit using them and rebarreled their rifles to 7.62 NATO.
TR
longrange1947
07-21-2011, 18:09
Don't.
Ok,
Here is the deal: I was thinking of a rifle capable of shooting both 7.62 NATO and 7.62X54 R using sleeves. I have checked a couple of actions (Rem and Mauser) for feeding the rimmed cartridge and they seem to work fine. In addition to the two separate bolts guess I will need to use two barrels.
You ask why, I say because...
MVP
longrange1947
07-22-2011, 10:44
Probably would have any way, as head space would be difficult for two bolts on one barrel. Especiallysince one head spaces off the shoulders and the other off the rim.
Figured the headspace would not be an issue since each sleeve woould have its own dedicated bolt. The sleeves would be vastly different from the Navy sleeve in that they would be more akin to a cartridge converter. Each sleeve would drop into the barrel's base chamber, nothing more than a counter-bore with a slight taper. Might need to fix in place with set screws.
Anyway, first project right now will be to chamber a barrel in 7.62X54R and get it in a Mauser with a modified bolt face and extractor... Extra Mauser bolts and replacement magnum extractors are much cheaper than Remingtons and easier to work on.
MVP
ObliqueApproach
07-22-2011, 14:16
This is probably not what you are looking for, but I have used Thompson Center rifles before and, with a few mods, the barrel changes out pretty quickly/easily. (http://www.tcarms.com/)
Funny the TC should come up.
As I recall there were some guys at SOTIC working on something IIRC called Advanced SOTIC and the TC was part of that course. Story is better told by LR1947...
MVP
Buffalobob
07-22-2011, 16:09
A lot would depend upon your accuracy requirements and rate of fire and rounds fired before cleaning. At 45-55kpsi powder residue is going to go everywhere
Jumping bullets long distances to the lands has not been one of the great success stories.
Perhaps you know the weird fact that a switch barrel rifle tightens its barrel up because of the torque of the bullets as they are fired.
Peregrino
07-22-2011, 21:40
Two rifles. More is always better. I would recommend staying away from the chamber adapters. The Navy sleeve had a reputation for problems (interesting because I remember seeing some for sale a few years ago; Numrich or Sarco IIRC). Any competent gunsmith can build you a switch barrel rifle. Buying/installing two average quality barrels will be cheaper than the machine work to build/fit chamber adapters. NTM - if you go the Mauser route a second bolt for the rimmed cartridge is relatively inexpensive. Course that's MOO, YMMV. :munchin
When I went to gunsmithing school my fellow student built a 45-70 on a Siamese Mauser. I cannot remember if he had to open the bolt face but there was no magazine work required IIRC. Not sure either 7.62 NATO or 7.62X54R would work out of the Siamese magazine IF I could find one. Regardless, both feed from a standard length Mauser magazine.
Two barrels works for me. Hoping for a 1.25-1.5 MOA gun in a solidly bedded wood stock. When I say solidly bedded I mean the entire action area will be bedding material (and a pillar in the rear) when completed, all wood removed. Two step process; deeply remove wood and bed action/barrel using inletting screws to align the action with the guard. Once done, do the reverse for the TG/floorplate.
I am not building a sniper gun, just an almost weather-proof knock around.
MVP