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Old 11-09-2006, 06:06 PM   #1
JAS
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7.62 X 54R .308 or .311

I am going to start reloading for my Mosin-Nagant 91/30, M44, and M38 rifles. The groove diameters on my three rifles run in the .311 to .312 range, and the bullets in the surplus ammo I have purchased so far were all .311 diameter. However, all of the loading data I see in my books shows loading this cartridge with .308 diameter bullets. Sierra makes a .150 grain bullet in .311 diameter and Hornady makes one .312 diameter. I have both for loading my .303 British. Is there some reason why I should not use these bullets in the 7.62 X 54R? I am not going to be hot rodding these rounds or rifles. I would prefer accuarcy over velocity anyway.
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Old 11-10-2006, 07:36 PM   #2
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Slug your bore

I used a fishing sinker to slug the bore on my Mosins that I reload for. use the closest size that will fit. my 28-30 is actualy a 308 bore.. easy to find lots of bullets for that one.. the Finns shoot the best, regardless of bore size.. most have metal (tin can) shims under the action to float the barrel. be careful when you dis-assemble them to not lose the shims.. HTH.. Les
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Old 11-11-2006, 11:17 AM   #3
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The proper bullet diameter for 7.62mmx54r is .310". That's what all the surplus ammo is and that's what the original was.

I think they all list .308" bullets because that's what everyone has in their bins. I reloaded with .308" for a while and accuracy was really terrible. After I found some, I started using .310" and things got much better.

I slugged one of my rifles and the bore was all the way out to .312".
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Old 11-11-2006, 01:19 PM   #4
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Suasponte found me this sight about slugging the bore.

http://www.surplusrifle.com/reloading/slug/index.asp

I haven't done my M-44 Carbine nor the Enfield yet. Problem I am finding with the bullets is that it's very expensive, so casting is the best route. I am right now drawing up a shopping list that that project.

Enjoy!
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Old 11-11-2006, 04:43 PM   #5
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Try this website for excellent information regarding the 7.62x54R. Note the foot note that indicates that many Russian rifles have bores/groove diameters that vary greatly. This seems to have been especially true during the war years.

http://7.62x54r.net/MosinID/MosinSpec.htm

I highly recommend that you shoot a bullet near your groove diameter. If you have a .312 groove, can you shoot a .308 bullet? Sure you can. Will it be as accurate as a bullet of .311 or .312 diameter...in a word...no.

I have a M44 (groove .312) and a M38 (groove a little under .313...maybe .3125). I shoot the Speer 150 gr. Spitzer in .311 (actually mic's closer to .3115) which is very accurate in both rifles. I have a Finn M39 (groove .310). I shoot a Hornady 174 gr. FMJBT in .3105) and it is very, very accurate.

Good luck,
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Old 11-11-2006, 05:08 PM   #6
JAS
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Thanks guys,
I picked up a set of RCBS 7.62 X 54R dies and the set came with expander balls for both .308 and .311/.312 diameter bullets. I also bought a hundred brass cases with boxer primer pockets made by Graf. Since I have 16 pounds of AA-2520 on the shelf I wanted to use, I looked around till I found some load data in a Lee loading Manual I have. I have found that AA-2520 lights best with a magnum primer so I used Remington large rifle magnum primers. The Lee manual said max was 43.2 grains so I went with 42.0 grains with 150 grain Hornadys and Sierras. We will see how they shoot Sunday morning.
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Old 11-11-2006, 06:26 PM   #7
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Mosin handloads

Jas: We'll all be waiting for a range report.... Les
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Old 11-11-2006, 06:39 PM   #8
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have fun - reloading for Mosins is fun! Just went to the range today to shoot some more of mine in my 91/30. It likes the .312 Hornady 150gr SP bullet.
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Old 11-11-2006, 06:49 PM   #9
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Keep me in the loop too man! I was checking into reloading with .308.
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Old 11-12-2006, 10:14 AM   #10
JAS
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RANGE REPORT !!!

I just got back from the range. I had to do all my shooting from the 50 yard line because the 100 yard range was too soggy. The first thing is that all three rifles liked the .312 Hornady 150 gr. spire point bullet the best. The 42.0 grains of AA-2520 ball powder with the magnum primer was milder than the surplus ammo I have shot in these rifles, but it sealed the cases well in the chamber and seemed very consistant and was pleasant to shoot even in the little M38 carbine.

This was the 91/30 with .311 diameter Sierra spitzer soft points:
[img]http://img.photobucket.com/albums/v483/JimScharf/Dscf1749.jpg[/img]

Here is the 91/30 with .312 diameter Hornady spire soft points:
[img]http://img.photobucket.com/albums/v483/JimScharf/Dscf1750.jpg[/img]

This is the M38 with Hornady bullets:
[img]http://img.photobucket.com/albums/v483/JimScharf/Dscf1751.jpg[/img]
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