7.62x54 in a M39 Finn...

panzer · February 22, 2008, 11:05

SO I have read that they are all .311 bores, but the Finn ammo is all .308, and all the dies I see are .308. SO where do I go? Will the .308 shoot fine from the .311 bore? This is so simple its confusing me. I want to reload, and the .311 sierra 174 grain is looking good, also saw some bulk 174 grain FMJ's but they are all .311

Rifle is a 1967 barrel M39

daschnoz · February 22, 2008, 11:26

Go for it. You're not going to blow up your gun.

I have shot many 0.308 dia bullets out of my AK - which should have a 0.310 bore (I never actually slugged the barrel). They shoot fine. It's an AK, so I can't really tell if they are any less accurate than the 0.310 dia bullets.

In the grand scheme of things, 0.003 is not a big deal. This means that the rifling grabs the bullet by 0.0015 (1.5 thousandths of an inch) less. That 1.5 thou "gap" between the bullet and the grooves will allow a bit of gas by, but not enough to make that much of a difference. If you need 0.5gr more powder to make up for the velocity lost due to blow by, that would be a lot.

Survey Punk · February 22, 2008, 13:57

Yo Panzer,
Whar y'all aseein' them 'are .311 FMJs in bulk?

JB

panzer · February 22, 2008, 14:07

http://www.wideners.com/itemdetail.c...d=8441&dir=278|281|727

Has .308 175's, I can't find the .311's right now, I will look again tonight... I know I saw them somewhere, but, I am getting older, so I might be confused with these here...

**SID325** · February 23, 2008, 22:46

Both of my M39's, "B" barrel and Sako, have .310 dia. barrels. I found some Hornady .310 dia 150gr bullets and they shoot very well. I think Hornady stopped making them, I can no longer find them.

Sid

mj2evans · February 24, 2008, 00:12

You need to slug the bore. You never really now the size until you slug it. Just get a fishing weight and some 1/4" dowell.

February 22, 2008, 11:05	#1
panzer Registered FALaholic #: 1988 Join Date: Dec 2000 Location: SMYRNA ,GA,THE BEST COUNTRY Posts: 2,119	7.62x54 in a M39 Finn... SO I have read that they are all .311 bores, but the Finn ammo is all .308, and all the dies I see are .308. SO where do I go? Will the .308 shoot fine from the .311 bore? This is so simple its confusing me. I want to reload, and the .311 sierra 174 grain is looking good, also saw some bulk 174 grain FMJ's but they are all .311 Rifle is a 1967 barrel M39 __________________ http://militarysignatures.com/signatures/member865.png "Also I heard the voice of the Lord saying who shall I send, and who will go for us? Then said I, here am I, send me." -Isaiah 6:8

February 22, 2008, 11:26	#2
daschnoz Registered FALaholic #: 20534 Join Date: Jul 2006 Location: Pennsylvania Posts: 780	Go for it. You're not going to blow up your gun. I have shot many 0.308 dia bullets out of my AK - which should have a 0.310 bore (I never actually slugged the barrel). They shoot fine. It's an AK, so I can't really tell if they are any less accurate than the 0.310 dia bullets. In the grand scheme of things, 0.003 is not a big deal. This means that the rifling grabs the bullet by 0.0015 (1.5 thousandths of an inch) less. That 1.5 thou "gap" between the bullet and the grooves will allow a bit of gas by, but not enough to make that much of a difference. If you need 0.5gr more powder to make up for the velocity lost due to blow by, that would be a lot. __________________ 7.62NATO - because shooting something twice with 5.56NATO is just plain silly. -------------------------------------------------

February 22, 2008, 13:57	#3
Survey Punk FALaholic #: 8380 Join Date: Dec 2002 Location: Blounts Creek, NC Posts: 4,163	Yo Panzer, Whar y'all aseein' them 'are .311 FMJs in bulk? JB __________________ "If innocence is no protection from the weight of criminal law, a crucial incentive to maintain innocence is lost" Fran Haga

February 22, 2008, 14:07	#4
panzer Registered FALaholic #: 1988 Join Date: Dec 2000 Location: SMYRNA ,GA,THE BEST COUNTRY Posts: 2,119	http://www.wideners.com/itemdetail.c...d=8441&dir=278\|281\|727 Has .308 175's, I can't find the .311's right now, I will look again tonight... I know I saw them somewhere, but, I am getting older, so I might be confused with these here... __________________ http://militarysignatures.com/signatures/member865.png "Also I heard the voice of the Lord saying who shall I send, and who will go for us? Then said I, here am I, send me." -Isaiah 6:8

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

February 23, 2008, 22:46	#5
SID325 Senior Member Bronze Contributor FALaholic #: 14958 Join Date: Jul 2004 Posts: 569	Both of my M39's, "B" barrel and Sako, have .310 dia. barrels. I found some Hornady .310 dia 150gr bullets and they shoot very well. I think Hornady stopped making them, I can no longer find them. Sid

February 24, 2008, 00:12	#6
mj2evans Registered FALaholic #: 11922 Join Date: Sep 2003 Location: Dallas, TX Posts: 1,084	You need to slug the bore. You never really now the size until you slug it. Just get a fishing weight and some 1/4" dowell.