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Long Loading

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Long Loading

Postby Shepard » Mon Jan 20, 2014 5:23 pm

LONG LOADING == loading your round to longer then specified numbers. This is done in most cases for increased accuracy. Depending on how you use your gun will determine if this can be done by you. If you use your magazine -- you will not be able to. Long loading brings the bullet closer to the rifling so theres less time to the lands. Target shooters will mostly go for a short jump to the lands where a hunter my go short so the bullet gets going faster before it hits the rifling. How you load and for what application determines this for me. Some guns have massive free bore -- Mosins that I put together don't. Here are 2 articles on OAL - one I've postd in the past and a new one from Berger.
Over All Length is something that each hand loader must work out for them selfs as there are no set rules other then the ones we're breaking by loading longer then the book says. This needs to be worked out for each gun we own as no 2 are the same and each may need something different to make it perform 100%

http://www.larrywillis.com/OAL.html


http://www.bergerbullets.com/effects-of ... to-part-1/
I walk in the foot steps of Carlos Hathcock -- to my end.
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Re: Long Loading

Postby tommyt654 » Tue Jan 21, 2014 6:55 am

Thanks Shep,great info. I'm probably just going to shoot PPU Match ammo for starters in my build then graduate (hopefully) into reloading my own. One of a group of Mosin owners in the area have worked up a few loads they swear by,but after reading the articles above I might avoid them until I know the exact tolerances I have in my chamber and then consider getting a reloader and doing my own. In the meantime I have about 300 rnds of the PPU Match ammo to go thru for brass in the mean time to keep me busy plus a few more mods.Keep the info coming tho as I'm reading all I can get and hoping my eforts will become fruitful and not a waste of time and money
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Re: Long Loading

Postby Shepard » Tue Jan 21, 2014 11:52 am

tommyt654 wrote:Thanks Shep,great info. I'm probably just going to shoot PPU Match ammo for starters in my build then graduate (hopefully) into reloading my own. One of a group of Mosin owners in the area have worked up a few loads they swear by,but after reading the articles above I might avoid them until I know the exact tolerances I have in my chamber and then consider getting a reloader and doing my own. In the meantime I have about 300 rnds of the PPU Match ammo to go thru for brass in the mean time to keep me busy plus a few more mods.Keep the info coming tho as I'm reading all I can get and hoping my eforts will become fruitful and not a waste of time and money


Let us know how it goes, I'd like to know how you think it shoots thru your rifle.
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Re: Long Loading

Postby Grimstod » Tue Jan 21, 2014 6:03 pm

So I got he hole Mosin family out and did some measuring. Lots of it.
Here they are from left to right. Finn M39, Laminated 1940 Izzy, Smyert Mk1 PE, Smyert Mk2 Sporter, Tu53, and Smyert Mk3

Image

I used same tool for all guns. Five measurements per gun. Bold is average.
Finn
3.166
3.167
3.172
3.162
3.166
3.166
Laminated
3.140
3.127
3.138
3.125
3.150
3.1366
Smyert Mk1
3.197
3.209
I was to disappointed to see how bad it was to keep measuring so I stopped. :cry:
3.203
Smyert Mk 2
3.031
3.017
3.030
3.023
3.035
3.0272
TU53
3.055
3.063
3.058
3.057
3.062
3.059
Smyert Mk3
3.048
3.037
3.036
3.038
3.036
3.039

The first thee exhibit the greatest amount of barrel erosion. This is just how much the lands will move as you destroy the barrel. (Sorry for the use of the word destroy) Its interesting to see that Smyert Mk2 has the shallowest throat but not by much. It has a beautiful bore that looks like it was just bought a new Savage at Bass Pro so this is not entirely surprising.
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Re: Long Loading

Postby Shepard » Tue Jan 21, 2014 6:44 pm

Ben -- If you get a chance - go back and read some of Devil Dogs post about him hand loading for his weekly league competition. His numbers I believe for OAL were 3.038. He posted about forgetting to crimp and removed a chambered round and it came apart. He also told me he lost 20 points that night by forget to crimp his rounds.
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Re: Long Loading

Postby Grimstod » Wed Jan 22, 2014 2:05 pm

I have tried crimped and uncrimped ammo in my gun. The uncrimped ammo shoots better.
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