01 September 2007, 09:10
Recoil RobExterior chamber area dimensions of a P-17?
I just received an insert for my barrel vise to hold a P17 barrel but it doesn't seem to have nearly enough taper. My barrel measures 1.301 where it meets the front ring of the receiver and about 1-1/4 inches forward of that, just before it turns the shoulder, it measures 1.251 inches, a taper of .050 over the 1-1/4".
Does this sound correct? Does anyone have an original barrel they could meaure for comparison?
Thanks, Rob
01 September 2007, 16:52
Marc_StokeldDepending on how your barrel vise was made, it is likely that th einserts do not need to exactly match the contour of the barrel. I made my barrel vise with a big bottle jack and a movable plate. I started out using oak blocks with tapered grooves milled in them. No praticular taper-just set the blocks at an angle in the mill vise and cut a tapered groove with the milling head.
I now use micarta blocks, as they are nearly indestructable. Did the same thing and just milled a random sized tapered groove in them. Have pulled all manner and sizes of barrels with the vise and blocks with no problems.
So what I am saying is that if your blocks have a good bit of contact with the barrel, I would try them and see how it works. Liable to be just fine.
01 September 2007, 17:36
Toomany ToolsMarc, where'd you get the Micarta block material? I'm tired of making new blocks every week out of oak.
Thanks,
01 September 2007, 19:03
Marc_Stokeldyou cna buy it from most knife making catalogs. It is pretty expensive, so th eblocks sold for knifemakers are suually smaller and cheaper.
I have a lot of it that I got when I worked in a sawmill. It was used for wearplates on a piece of machinery we had. I cut it into blocks about 4"x4"x3/4". This fits the vise I made.
01 September 2007, 19:55
tin canMcMaster-Carr sells Garolite, which I believe is the same, or very similar material.
McMaster-Carr is a bit pricey, but always a good reference.
Garolite03 September 2007, 10:30
Recoil RobAnyone have a chance to measure a barrel?
Rob
03 September 2007, 19:40
MasteriflemanI never measured an Enfield barrel but you are correct in your observations, there is a heavy taper at the chamber section on all arsenal Enfield barrels. Unless you want to save it, I used to cut a relief groove right at the barrel/receiver junction to thread depth and used a pipe wrench with a "cheater bar" to take it off. A lot of the P-17 barrels had .311" groove barrels left over when the UK cancelled the contract on the P-14's. These are recognizeable by the 5 groove, left hand twist in the bore. At any rate, I was never tempted to use the original barrels.
04 September 2007, 00:06
tin candon't have a barrel, but DeHaas gives the dimension over the chamber as 1.325 for P14/M17 Enfields.