Rem 40X Rimfire Actions

[TonyR]

A couple of basic questions and any help would be appreciated. Will a 40X rimfire action fit into a stock pillar bedded for a Remington 700 Short Action? Do the same after-market triggers such as Jewell, work with the 40X rimfire action as work on the 700?
Thanks very much.

 

[blcouch]

After reading ALOT about this subject (I have a 40x I'm putting together), that would be a yes on the stock part and a 'pretty sure' yes on the triggers. A good many people on SnipersHide are putting 40Xs into McMillan, AICS, Manners and other S/A Remington pattern stocks, some with Aluminum pillars. I have a Bell and Carlson M40 stock on the way and can give you a bit more info when it gets here. Hope this helps.

 

[TonyR]

Thanks very much. This is a longer-term "maybe" project so please report your findings as you move along.

 

[jcf3202]

If the 40X rimfire action has the knurled oval bolt knob, it will sit in a 700 SA stock. Depending on how the stock is inletted, whether with a solid magazine well or open, you may to relieve an area for the screw which holds the rimfire loading ramp in.
Triggers are interchangeable as well.

Now if the 40X rimfire action has a round bolt knob, this is based on a 722 action. Action screw spacing is the same however the rear tang is larger and may require stock modification to seat properly. This larger tang may also create some issues with triggers that use a 700 style safety lever.

I believe that all rimfire 40X's marked with a B or an R suffix to the S/N are based on the 700 action. If the S/N has no suffix, most likely this is the 722 based action.

Hope this helps.

 

[snert]

Mantha nailed it. Depends on the vintage of the 40X and the vintage of the stock. The 722 based 40X will have a "straight" not "swept" bolt, and a 700 stock will require a rather ugly relief of wood in the frontof the bolt notch. The stock will also need a bit of releif in the tang and rear portion of the reciever area. No biggie, just releive it, and bed it.

A 722 based reciever is wider, and a 700 or 40x or 40XB trigger will hang on it, but the safety lever will not clear, as the reciever is wider right where the safety lever comes up past it. Again, that can be "fixed" with judicious application of a heat sink and a common propane torch (go slow) to bend the safety lever to the correct "sweep" to miss the reciever, then releive the wood in the area of the safety lever on the stock too. If you plan, go slowly, and have an eye for detail and art, you can make it look ok.
If the 40X is the swept bolt type, it plops right in and you just need to add the tiny screw that mounts the mag floorplate.

Cheers,

Snert

 

[Va Jim]

TonyR

I have talked to Ray Bowman (Precision Rifle and Tool)about this. The actions I got from the CMP will fit. I am having him build me a FTR training rifle using the remington 40X action on of his FTR stock and the aluminum bedding chassis.

I think this will be a good trainer out to 200 yds.

JimC

 

[TonyR]

Jim
You don't need any training Will you be at Quantico for the mid-Range Regionals? Ray was talking about your new gun and I want to see it.

 

[Va Jim]

Tony

As soon as they open up I will be there.

JimC

 

[TonyR]

They seem to be running late so those matches seem likely to be post-poned.

 

[TonyR]

If the 40X rimfire action has the knurled oval bolt knob, it will sit in a 700 SA stock. Depending on how the stock is inletted, whether with a solid magazine well or open, you may to relieve an area for the screw which holds the rimfire loading ramp in.
Triggers are interchangeable as well.

Now if the 40X rimfire action has a round bolt knob, this is based on a 722 action. Action screw spacing is the same however the rear tang is larger and may require stock modification to seat properly. This larger tang may also create some issues with triggers that use a 700 style safety lever.

I believe that all rimfire 40X's marked with a B or an R suffix to the S/N are based on the 700 action. If the S/N has no suffix, most likely this is the 722 based action.

Hope this helps.

Well, I found a 40X with the B suffix and I'm going to get one of Dave Kiff's replacement bolts and put it in my Rem 700 SA F-Open stock. Except for the recoil, it should feel normal which is what I want for practice.
Thanks everyone for the input.

 

[Va Jim]

Tony

I think you will like that. I have been using one for practice. It is def a good training device. I dont have the ammo or targets yet for 200 yds but still looking. Flags will be a help also.

JimC

 

[TonyR]

Hopefully, everything will be good to go by the end of May. I am hoping to improve my ability to break shots consistently. I just fire-formed 400 Shehane cases at 100 yards and I was impressed by how much the group opened up, even at that distance, if I didn't hold the gun exactly the same every time. This should be a cheap way to build muscle memory without driving a couple of hours round trip to a high power range for practice.

 

[offgrid]

TonyR,

how's your 40X coming along.? Considering doing the same thing for the same reasons.

Any issues with Dave Kiff's replacement bolt?

Thanks

 

[TonyR]

TonyR,

how's your 40X coming along.? Considering doing the same thing for the same reasons.

Any issues with Dave Kiff's replacement bolt?

Thanks

I don't know; but I should know more at the end of the month. My gunsmith did not anticipate any problems. He said the receiver looked good and measured well. I've had Kiff bolts for my Rem 700 SA center-fire and they have been great. I'll post something when I know more.

 

[butchlambert]

I have used several Kiff bolts and they are good to go. My new to me 40X rimfire has a Kiff bolt and it is quality. Dan Armstrong, www.accu-tig.com, has it for a new bolt handle. Kerry Stottlemyer built me custom scope bases for it. Designed them in CAD and CNC'd them. He sent photos this afternoon. He just needs to polish them.
Butch

 

[TonyR]

I have used several Kiff bolts and they are good to go. My new to me 40X rimfire has a Kiff bolt and it is quality. Dan Armstrong, www.accu-tig.com, has it for a new bolt handle. Kerry Stottlemyer built me custom scope bases for it. Designed them in CAD and CNC'd them. He sent photos this afternoon. He just needs to polish them.
Butch

Butch.
Will the one piece scope bases for the Rem 700 work on a 40X rimfire receiver with the 700 foot print? I have an EGW for my 700 SA sitting around and I thought I'd use that.

 

[rayjay]

The 40x rimfire receiver uses the same bases as the 40x/700 centerfire receiver.

 

[Rtheurer]

Tony R

I have a action from CMP with a Kiff bolt and it shoots lights out. It shoots as well as most 20 series Anshutz rifles. The only problem I had was the firing pin needed to be trimmed down as the protrusion was to long and while I was installing one of Tom Meyers awsome Extreme triggers the firing pin dropped a couple of times on a a empty chamber, there for pinning the chamber or breach face. I fixed the chamber and its back to shooting tiny groups at 100yards.

I put mine in a Ellisio R1 tube gun stock for prone training, copying my Palma Rifle. I hope yours shoots as good as mine.

RussT

 

[butchlambert]

Scope bases work and I think a 40X rimfire receiver will take a centerfire bolt if God forbid you wanted to do that.
Butch

 

[SDWhirlwind]

I have used several Kiff bolts and they are good to go. My new to me 40X rimfire has a Kiff bolt and it is quality. Dan Armstrong, www.accu-tig.com, has it for a new bolt handle. Kerry Stottlemyer built me custom scope bases for it. Designed them in CAD and CNC'd them. He sent photos this afternoon. He just needs to polish them.
Butch

Butch.
Will the one piece scope bases for the Rem 700 work on a 40X rimfire receiver with the 700 foot print? I have an EGW for my 700 SA sitting around and I thought I'd use that.

In early 70's Remington changed the bridge height on rear which is when the letter prefix started on the 700 recievers. The older non prefix and 40-X/XB use same bases. Change was only .017 but 'might' affect how bases made after that change will fit on the earlier 700's and 40-X/XB recievers. Easiest way to check is set base on and tighten front 2 screws. Then check and see if base raised up off of rear bridge. If there is a gap you will either have to shim or bed to fit. Without doing so will cant base to the rear and rob you of elevation.

I have a later 79 XR and using 2pc Leupold bases had to shim .030 so scope would set flat in front and rear rings. Tried 3 different scopes before shimming and none would reach 50yds before bottoming out. Not a real concern with 1pc but with 2pc bases it would be possible to tweak, bend, distort or damage a scope tube.

Contrary to the above now, I used new Leupold bases on a '61 40-X reciever recently and everything lined up great. Guess it depends on machining tolerances and polishing reciever combined with variances in allowed tolerances on bases. Could go in your favor or in rare cases against.

Just a heads up to check so you aren't scratching the noggin later wondering why you have so little elevation adjustment. 1/8 minute clicks makes it worse yet.

Respectfully,
Dennis