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Old April 24, 2006, 07:12 PM   #1
jhgreasemonkey
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any smiths with O/U knowledge?

I was curious if I could have my Baikal izh94 o/u converted. Its 12guage on top and 7.62x39 on the bottom. I would like the bottom to be converted to 7.62x54r. I would immagine the same barrel could be used. The gun also comes in a 30-06 version so it should be strong enough for the larger cal. Just some machining to the chamber? Anyone have any insight on this? Thanks.
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Old April 24, 2006, 08:25 PM   #2
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It is rather more trouble than you might suppose because the wide rim of the 54R is bigger than even the 30-06. The ejector would have to be made to fit. This is likely a heat-treated part that can only be cut safely by grinding, and not by a chamber reamer. I would suggest that if you want more horsepower you go to 30-06 so the ejector can simply be purchased.

Nick
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Old April 25, 2006, 12:09 PM   #3
jhgreasemonkey
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Thanks. Good call. Since the 7.62 is .30cal then could I use the same barrel or are the sizes too different with the 30-06 and 7.62 bullet diameter that this wouldnt work?
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Old April 25, 2006, 12:14 PM   #4
leadcounsel
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Savage makes an over/under. Don't recall the caliber of the rifle. Probably a lot cheaper than retooling a current gun.
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Old April 25, 2006, 09:22 PM   #5
Unclenick
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I don't know about the price of the conversion? My Baikal air pistol was incredibly inexpensive relative to its features and performance (about a tenth of what an equivalent performing German one costs now, though the German product would have better fit and finish). Check parts availabliity. It may be you can get a barrel set with the 30-06 chambering and ejector for less than either reworking the original or a Savage?

Most of the loading manuals use .308 bullets in all these calibers. If you look up the original metric rounds, some illustrations put the bullets at .311" and some at .309". Government spec for 30-06 and .308 barrels is something like .3065" to .3095", if I recall correctly?

Out of curiosity, I grabbed a couple of boxes of 7.62 x 39 from the basement. One is Winchester, the other Lapua. The bullets mic'd at 3.0980 and .3105, respectively. If you slug your bore and it matches, that is still small enough that a .308" will bump up into it. Some European shooters report very good accuracy with slightly oversize bores in full loads. The main thing is the barrel must be straight. Shooting cast bullets through a bore larger than they are will cause leading and gas cutting, so they would have to be sized larger. Also, any bullets you find in this diameter can be loaded in the 30-06 case without special tooling. I don't know how heavy you can buy them commonly? Lapua lists a 200 grain FMJBT that is .310.

Nick
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Old April 26, 2006, 01:00 PM   #6
jhgreasemonkey
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Thanks for the info. I found out that they have a 7.62x54r version of this gun but the problem is finding one. I think I will call a local gunsmith and see what they can do.
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