The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Big Bores FN Mauser 500 Bateleur, and Ruger No. 1 400 BateleurGo | New | Find | Notify | Tools | Reply | |
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Ron you have a PM. Jim  "Life's hard; it's harder if you're stupid" John Wayne | |||
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All rightee let’s resurrect this thread also… And compare our commercial FN M98 Mauser builds…  1st up Ron’s ---
And then mine --- I haven’t weighed it yet – both have 21.5” barrels with 3-groove 1:9” twist.
And the Weibe 4MJ magazine works perfectly --- As can be seen, there is glass work needed to better fit the barreled actions to the stocks in both rifles. Metalwork finish also needed. Currently I’m still noodling over the metalwork finish (leaning towards Cerakote) and what finish (paint scheme) I’ll have applied to the synthetic stocks. Jim "Life's hard; it's harder if you're stupid" John Wayne | |||
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Very nice, Jim. Amazing that the flush bottom metal by Wiebe has so much internal capacity on both the .423/.338LM and the .500/.338LM aka 12.7x68 Magnum 49-10, aka 50 Bateleur. As can be seen on my 500 Bateleur (.510/.338LM), "glass work is needed" also, for a different reason, to fit my protruding bottom metal (Wiebe for 500 Jeffery), to turn it into a drop-belly stock. Same stock as yours. Mine would take a lot of Bondo and a paint job. That will probably never happen.  | |||
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It is amazing how well that trapezoid shape works. The lighting in our house is the pits – partial reason for the “dullness” of the photos. If I can finds some portable lights around here I’ll pull the bottom metal from each rifle and take photos from above and below. Should show the trapezoid shape as well as the difference in the inside machining Steve did on the boxes. By the way, did you notice the difference in the trigger guard shape between your bottom metal and mine? Jim "Life's hard; it's harder if you're stupid" John Wayne | |||
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Yes, I did, Jim, and yours is prettier. Of course beauty is easier for yours when the floorplate level is not half way down to the bottom of the trigger guard. Oh, yeah, scratch the idea of a Winchester M70 400 Bald Eagle. No 50 bateleur will be molested. Both of those rifles are just too good to rebarrel. "400 Bald Eagle" now refers to a shortened .408 Chey-Tac, and "400 Bateleur" cartridge name is now for the .408/.338 Lapua Magnum 2.700" Un-improved. The 400 Bateleur will have to be a CZ 550 Magnum, to take advantage of the .408 long-nosed bullets in a +3.8" box ... or a Ruger No. 1 single-stuffer. Progress!  What Buffalo Bill could have done with one of those ... "Last of the Great Scouts."  | |||
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I finally got around to measuring up the Wiebe 4MJ bottom metal used on my commercial FN M98 Mauser build… The 4MJ bottom metal is CNC machined from a solid block of metal; the magazine is integral rather than separate, the magazine is trapezoid shaped inside, and it designed to hold 4-404 Jeffery cartridges within the magazine. Rather interesting how the box is laid out. The following are the internal machined dimensions allowing it to hold 3-12.7x68 Magnum cartridges within the magazine with room to ‘thumb’ a 4th round down to slip under the extractor when chambering... So without further ado, here are the dimensions and photographs of the 4MJ bottom metal as modified to work with the .338 Lapua Magnum derivative 12.7x68 Magnum cartridge – – – Magazine Dimensions: Height – Outside of the magazine box – floorplate moved out of way: Front = 1.140” Rear = 1.340” Length of Box: Top = 3.607” Bottom = 3.610” Width inside box, at top of the box: Front = 0.882" Middle (body to neck cut) = 0.937” Rear = 1.006" Width inside box, at bottom of the box: Front = 0.882" Middle (body to neck cut) = 0.917” Rear = 0.974" Side view of 4MJ bottom metal with spring and follower removed:  View of slight flat area, milled so bottom metal would fit within the full-length bedding block in the B&C Medalist synthetic stock:  Top-side view of the magazine box showing milling transition body area the neck area:  View of milling within the floorplate:  View of the 404 Jeffery follower:  There you go Ron… I finally completed my homework… Jim "Life's hard; it's harder if you're stupid" John Wayne | |||
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Very interesting. Narrower at the bottom middle and rear widths than at the top? Just the opposite of what I was thinking. That is just the opposite of what he does with the XRM sheetmetal box for .375 H&H. | |||
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Yes it’s just the opposite of how I thought it’d be as well. But it works! Guess it makes sense though when one thinks about it. 1st round stacks under the right rail of the box, 2nd round stacks under the left rail of the box, and 3rd round under the right rail of the box – so it needs to be slightly wider in the area under the rails for proper retention and feeding. And it feeds all three rounds very slickly. The 4th round is kinda a pita in the sense it wants to slip towards the left rail when moving the bolt forward to catch it under the extractor; a little practice will eliminate my ‘thumb bumbling’ though. Jim "Life's hard; it's harder if you're stupid" John Wayne | |||
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Note: Bolded with red lettering above quoted test... I was just killing time before roosting so was re-reading some of our old threads. Lo and behold, this popped right up to peak my interest: The XRM M70 Classic box will allow 3 of our 12.7x68 Magnum/49-10 cartridges down in the box and close the bolt and work the action, but the XRM box will not allow that 4th cartridge to be partially loaded into the box for CRF. You could pushfeed the 4th cartridge as the bolt is closed over 3 down, that's all. I definitely read the information the first time but missed its importance due to being focused on the ability to partially thumb the 4th round down in the box to be picked up by the extractor to chamber the round. The M70 extractor is bevel designed to snap over the rim when “push-feeding” a round into the chamber. Anyway, the reason this peaked my interest is because it requires very little to bring a FN SC Winchester M70 up to 3-down with the .338 Lapua Magnum derivatives while allowing “push-feeding” the 4th round into the chamber. This I perceive is important because the factory M70 Winchester rifles in RUM and WSM chambering configurations allow only 3-down in the magazine and one must “push-feeding” the 4th round into the chamber. Well, time to roost… Jim "Life's hard; it's harder if you're stupid" John Wayne | |||
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The Accurate Reloading Forums THE ACCURATE RELOADING.COM FORUMS Rifles Big Bores FN Mauser 500 Bateleur, and Ruger No. 1 400 Bateleur
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which switches the top cartridge to the other side:
