I am going to build a 6.5 Grendel on a bolt action rifle. I will not be constrained by the AR type magazine length and as there will never be a factory round in this rifle I want to seat long and as my intention is to use the mini mauser my question is regarding the magazine length. I dont have a donor rifle yet but the Zastava site http://www.zastava-arms.rs/cms/index.php?id=244 lists the magazine length as 58.3 (2.295) yet they also nominatete it for the 22-250 which has a OAL in the hornady book of 59.71mm (2.350) How is this fitted and how easy is it to lengthen the mini mauser magazine. I have lengthened a 98 magazine for a 404 so is it as simple as that.

I have a Mini Mk X in 7.62x39 and the mag well measures 2.240. I have thought about that conversion myself.

Steve E............

Some of the earlier Interarms units were not as long, but longer than the 223 Sakos. I bought one of the Daly 22-250 actions and it around 2.3, as you note. I barrelled it at first in 6BR, but ended up putting a 250 Savage barrel. The 250 has a max length of just over 2.5", but I couldn't find any factory rounds onger than 2.35 to 2.4. I was able to open the action up to right at 2.45, which works well. I removed the bolt release and ground the bolt stop back to minimum to allow the bolt to cycle enough to pick up the longer rounds. I took a dremel cutting wheel and split the rear corners down to near the bottom, bent it back in an S and tacked in a little tiny spacer at the top. (You cant cut the entire back out and extend it due to the location of the locating screw into the floorplate). It works fine this way, because the rounds start angling upward as they go deeper into the magazine. It works fine. I did a little polishing of the ramp and chamber mout to slick it up for the larger bullets.

I would presume this would work with a CG, a Remmy 799, or a Zastava.

Hope this helps. The 2.45" length is the absolute most you could go, I think, without grinding out the feed ramp, which I think would be a "HELL NO!!" with this tiny action. You could modify the back of the magazine to get a tiny bit more, if you redid the box mount on the floorplate, but you simply run out of bolt stop at this point.

By the way, why not use a PPC action. Are they shorter? You could always swap the magazine box and follower. The bolt would fit better.

50 baywolf ?

converted my 22-250 to 7mm BR.

http://home.pipeline.com/~shoo...er/Mini%20Mauser.htm

Von Gruff, were you and NSA been listening to our conversations during bear season out here on the Alaska peninsula?
A 6.5 Grendel on a classic little action was the hot topic. Maybe the recoil of our bear rifles had scrambled our brains
The little CZ would be my choice if someone like Duane would build us some nice bottom metal for it.

quote:

Originally posted by 458Win:
Von Gruff, were you and NSA been listening to our conversations during bear season out here on the Alaska peninsula?
A 6.5 Grendel on a classic little action was the hot topic. Maybe the recoil of our bear rifles had scrambled our brains
The little CZ would be my choice if someone like Duane would build us some nice bottom metal for it.

-there's abreviated .223 factory metal, IIRC.

Butch is working on one right now with nice bottom metal. Maybe he knows where to get it.

quote:

Originally posted by Art S.:
Some of the earlier Interarms units were not as long, but longer than the 223 Sakos. I bought one of the Daly 22-250 actions and it around 2.3, as you note. I barrelled it at first in 6BR, but ended up putting a 250 Savage barrel. The 250 has a max length of just over 2.5", but I couldn't find any factory rounds onger than 2.35 to 2.4. I was able to open the action up to right at 2.45, which works well. I removed the bolt release and ground the bolt stop back to minimum to allow the bolt to cycle enough to pick up the longer rounds. I took a dremel cutting wheel and split the rear corners down to near the bottom, bent it back in an S and tacked in a little tiny spacer at the top. (You cant cut the entire back out and extend it due to the location of the locating screw into the floorplate). It works fine this way, because the rounds start angling upward as they go deeper into the magazine. It works fine. I did a little polishing of the ramp and chamber mout to slick it up for the larger bullets.

I would presume this would work with a CG, a Remmy 799, or a Zastava.

Hope this helps. The 2.45" length is the absolute most you could go, I think, without grinding out the feed ramp, which I think would be a "HELL NO!!" with this tiny action. You could modify the back of the magazine to get a tiny bit more, if you redid the box mount on the floorplate, but you simply run out of bolt stop at this point.

By the way, why not use a PPC action. Are they shorter? You could always swap the magazine box and follower. The bolt would fit better.

That is exactly the information I needed to hear so much apreciated.That will definatelt get this project on the "go board"

quote:

Originally posted by 458Win:
Von Gruff, were you and NSA been listening to our conversations during bear season out here on the Alaska peninsula?
A 6.5 Grendel on a classic little action was the hot topic. Maybe the recoil of our bear rifles had scrambled our brains
The little CZ would be my choice if someone like Duane would build us some nice bottom metal for it.

Phil, I am not able to listen in to anyone elses conversations as there are enough voices in my own head they would be inaudable

I sometimes have "what if" moments and when I was given the lend of a friends rifle to play with after I mentioned (not quite obsesively, but posibly more than once) my growing desire for a 6.5 Grendel. His rifle was the 7.62x39 simply necked down to 6.5 with a short neck but no body changes. I put his cartridge next to a Grendel cartridge I had and there was a "what if" that became quite difficult to ignore. This is a pic of the two cartridges and you may see what I was thinking.

The what if was moving the Grendel shoulder-neck junction forward to the 6.5x39 shoulder junction so I did some measuring and suchlike and come to the conclusion that it could be done.
My solution was to fix a .05 spacer and in my case I used an out of circulation NZ 2 c coin drilled and shaped to the shell holder. I have Grendel FLS die coming and will hydroform a 7.62 case in the die with an extra .006 shim on the shell holder with coin and this will be the no go guage for headspacing the barrel at fitting time, and I will make one with a .03 shim + coin for a go guage so that for every day use a full length size with the shell holder + coin will give a .03 (probably .02 with springback) of ashoulder bump.
Next was the seating depth and I have a dummy on the necked 7.62 case (untill my Grendel dies get here as they arein transit from Sinclairs, along with some other goodies) and as I intend to initially set up with the 123gn A Max bullet I have a overall cartridge length of 2.375 which was my reason for wanting to know the fixable length of the Zastava magazine. Is anyone able to get and legally send me a 7.62x39 Zastava bolt as I know eheere there is an action that has a blown extractor on the bolt. Parts are not held by the importer here and he is not that co-operative. The other thing I will change from the standard SAMMI Grendel chamber that is designed arround the AR needs is the neck measurement so want a neck of .295 rather than the .300 of the SAMMI chamber. This co-incidentally is what the Pac-Nor Gren Match pre-chambered barrel is chambered for and a simple throating to bring it up to my seating depth and I will have a neat light little hill rifle with a cartridge that we have conservatively worked out should have a considerable increase on the Grendel round with the increase in case length and a longer seating depth especially when you take into account I will be able to run it at 59-60K where the Grendel is run at 50K.
I call this round the 6.5 GM (for Grendel Max)Getting a barrel in NZ is also problematic as the Pac-nor agent only brings in blanks and adds value for himself as a GS in the rest of the work. He does not have the reamer and the only one I can find is the .300 neck so again if anyone can get a Pac-nor 6.5 Gren Match and legally send it to me I might be able to get this project some legs.


So gentlemen have at it.

I'm currently building (very slowly) two mini-mausers for my kids. I've collected all the parts, reamers, and stock blanks. Just need to finish rebuilding my lathe. The first is a 30BR on a 22-250 action. The second is a .30 on a blown out Grendel case in a 7.62x239 action. The reamer is based off the 6mm AR Turbo 40 Improved developed by Robert Whitley. Shoulder is blown forward and out to 40 degree taper. Should be interesting to get it to feed. Robert has several variations on the Grendel case that he can supply dies and barrels for. www.6mmAR.com

gzig5, I have just read you post on the garrage gunsmith and it add a bit of depth toyour post here.

Unfortunately Robert dosent ship out of the US.