P14 scope mounting

I assume the rear sight protectors were machined off??

If so, hopefully it was done by someone that did the job properly.

Many of them were done by commercial rebuilders and were very well done.

You may have to take your scope/rifle to a smith and get him to measure the difference between the front receiver ring and the rear bridge.

If the sight protectors are still intact, Amazon has a base that will use the existing holes.

Google Weaver Mounts Chart

Scroll down until you get to Enfield.

There you will see the three most common profiles these rifles were milled/ground for.

Mod 30 Rem/ Mod 70 Win/ Model 721 Rem

Without actually trying bases on your receiver, and not knowing the dimensions, it's next to impossible to tell you which bases you need.

They used to make a one piece base, but that proved to be problematical, because smiths didn't always space the holes properly.

Now, they only make two piece sets for the three models I listed.

I've had to remove material from some bases to fit these receivers and in some cases, add shims to keep them level.
 
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The rear sight protectors have been machined off and it has been drilled and tapped. I will check out the Weaver page, I have a bag full of Weaver mounts so hopefully I will find something that works.
 
On those P 13-14's, the front ring & rear bridge do not match in contour when the ears are trimmed off and you cant simply put an action in a lathe & spin it to make them match. The underside of the action at the trigger mounting will not turn in the same radi that it must to make it match the front. A solution I have seen used is to build a teter-totter jig for the milling machine that allows the operator to pivot the action back & forth under a mill cutter or surface grinder....inconvenient as hell but ends up with matching rings.
 
If the job was done properly and the rear bridge contoured to Remington M30 specs, you need #11 Weaver bases for both the front and rear. Of course, I'm assuming the gunsmith used the same spacing for the tapped holes as the Weaver bases. Back in the day, this was the usual way of sporterizing P14 and M1917 Enfields.
 
"Most usual way" - almost gets one into difficulties immediately - I have a number of P14 and M1917 sporters done up by BSA - 1950's?? I think they sold a fair number into Canada? Rear bridge hole spacing is .605", front pair is at .860". BSA typically filled that oval found under the original rear sight spring, so they could chose most any rear base spacing they wanted. That original hole in the rear receiver bridge, though - the one that held that leaf spring in place - is a BA thread I think - not #6 nor #8 size - certainly not 48 or 40 tpi either...

They are often found with a Weaver #36 base on rear - about their only base with .605" spacing - then shims or whatever to get a front one perfectly flat - so often a Weaver #35 or a #20A - have to verify that top edges indeed are in line and at the same height. A home garage guy or a small shop has to really fight through the hardness on some of them to get the rear sight guards removed, then to drill and tap - advantage of a BSA sporter - is already all done...
 
Potashminer said:
"Most usual way" - almost gets one into difficulties immediately - I have a number of P14 and M1917 sporters done up by BSA - 1950's?? I think they sold a fair number into Canada? Rear bridge hole spacing is .605", front pair is at .860". BSA typically filled that oval found under the original rear sight spring, so they could chose most any rear base spacing they wanted. That original hole in the rear receiver bridge, though - the one that held that leaf spring in place - is a BA thread I think - not #6 nor #8 size - certainly not 48 or 40 tpi either...

They are often found with a Weaver #36 base on rear - about their only base with .605" spacing - then shims or whatever to get a front one perfectly flat - so often a Weaver #35 or a #20A - have to verify that top edges indeed are in line and at the same height. A home garage guy or a small shop has to really fight through the hardness on some of them to get the rear sight guards removed, then to drill and tap - advantage of a BSA sporter - is already all done...
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Depending on where the rifle was originally purchased, after BSA distributed them, both Tasco and Redfield bases were available to fit their profile, which had similar height differences between the reciever ring and the milled/ground bridge profiles. I believe Bausch also made bases for that profile.

EGW makes mounts for the Remington Model 725, which may or may not match the profile of your rifle, but with a little care, could be modified to fit acceptably.

40102
Remington 700, 721, 725, Sauer 100/101, Bergara B14 Long Action Picatinny Rail 20 MOA
SKU:40102
From
$39.99
 
My experience is they typically are drilled and tapped for the Weaver Remington 721 bases - #36 & #35. Sometimes the Mauser 98 #45 & #46 will work, but the rear sight needs to be a flat base which the 98 is not - you would have to grind the base and shim it.
 
The BSA conversions often only had one hole in the rear receiver bridge. So the choice was to tap a second hole and use two piece bases, or use a one piece base. I have done both. Latest effort uses a Leupold Rem 700 long action one piece base, fit like a charm. However, that may have been buzzard luck, as I have noticed quite a bit of variance in the profile and height of the rear receiver bridge of the various BSA's I have seen.
 
I have not yet run into a BSA conversion that did not have two holes on rear bridge - but that is only maybe less than a dozen, all told, so a single hole is quite possible!! That single hole may well be for the original rear sight spring screw - was a BA size and thread, I think - not originally 6-48 or 8-40 thread. And for sure about the "... quite a bit of variance in profile ..." - installing bases, correctly, to be flat-on-top to each other, on BSA, is surely not a "plug and play" thing like we have become used to doing!!!

An acquaintance in Alberta tells me that there was a very long one piece base made for the P14/M1917 at one time - apparently also a longer internal length magazine box as well - possibly by a Canadian outfit in Eastern Canada - he has installed a number of them in years past, when making up conversions to longer H&H length "boomers" - but neither he nor I have seen them for sale for past several years - I have not handled one of either, ever.
 
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IF the rifle is one sported by BSA, bases for a long action Remington would be a good starting point. They have worked one the ones I have encountered.
However, these rifles were sported by many different people with many different approaches to handling the rear bridge.
Sight unseen, there is no way to tell the OP what bases would work on his rifle.
Photos might help.
The BSA sporters can be identified by the presence of the BSA trademark on the breech of the barrel - the BSA "Pilarm" mark. Many have a sported issue stock, with the grip neatly checkered.
 
iroc22 said:
My experience is they typically are drilled and tapped for the Weaver Remington 721 bases - #36 & #35. Sometimes the Mauser 98 #45 & #46 will work, but the rear sight needs to be a flat base which the 98 is not - you would have to grind the base and shim it.
Click to expand...
My P14 as done by Elwood Epps, has a #35 on the receiver ring and a #36 on the rear bridge.
 
Thanks for all the suggestions and help. I finally got it figured out and I ended up using a #45 and #55 weaver bases. Which are what I had in my bag of bases.
 
Potashminer said:
An acquaintance in Alberta tells me that there was a very long one piece base made for the P14/M1917 at one time - apparently also a longer internal length magazine box as well - possibly by a Canadian outfit in Eastern Canada - he has installed a number of them in years past, when making up conversions to longer H&H length "boomers" - but neither he nor I have seen them for sale for past several years - I have not handled one of either, ever.
Click to expand...

Century’s Centurions tended to sport a weaver one piece, two holes on the reciever ring, only one hole on the rear bridge. It had a step in the rear contour to align them, as they did a flat top rear. The one piece weaver could be had, and made to fit a multitude of guns with sone work.
Century did the mag box conversion as well, iirc the parts were available from wgp or sir for a number of years.
 
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