Home Armory: Sniper handload tests. - Page 2

Home Armory: Sniper handload tests.

This is a discussion on Home Armory: Sniper handload tests. within the Reloading forums, part of the Sniping Related category; I wish I had access to the 1000 yard underground tunnel range that is about 25 minutes from my house at Lake City Ammo Factory. ...

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Thread: Home Armory: Sniper handload tests.

  1. #11
    Senior Member Dust_Remover's Avatar
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    I wish I had access to the 1000 yard underground tunnel range that is about 25 minutes from my house at Lake City Ammo Factory. Been up there several time to deliver stuff to contractors, and I hear them testing ammo from time to time, but I don't know where the range is at. If I had access to that that would be the best method of testing handloads. You can lock the gun in a vice, and take all the external factors out like the wind, and trigger squeeze.

    Branden
    Once you go FDAC, you'll never go back!

    -Me

  2. #12
    Senior Member JCinPA's Avatar
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    Trying to duplicate the Black Hills Match .308 load.

    The group below was fired on Christmas Day, 2007 in 50 degree (F) weather, no wind, at 100 yards, from a bench off a Caldwell Deadshot front shooting bag and a gym sock with a pound of lentils in it at the rear.

    Savage FP10 with 20" bull barrel, Bell & Carlson Medalist tactical stock, Mueller 4-16x50 AO scope on TPS base & rings.

    Once fired BHA brass (I understand BH uses Winchester brass), Winchester LR primers, Sierra Match King 168 gr. BTHP's loaded over 43.5 grains IMR4064, to 2.800" COL. Ammo loaded using a Lee Classic Cast Press, and Lee Deluxe die kit, including their Factory Crimp Die.


  3. #13
    Senior Member Dust_Remover's Avatar
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    That's a nice group!! I need to get back out to the range and do some more shooting. Range should be almost empty now giving me the place to myself.

    Branden
    Once you go FDAC, you'll never go back!

    -Me

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  5. #14
    Super Moderator monteboy84's Avatar
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    Quote Originally Posted by JohnCollins
    Sierra Match King 168 gr. BTHP's loaded over 43.5 grains IMR4064, to 2.800" COL.
    How do your pressure signs look with 43.5 grains of IMR 4064? My pressure signs were all okay with it, but it was a little hot for my Winchester and groups settled down when I lightened it up a bit, I'll have to check my load book to see where I was at.

    Nice shooting BTW 8)

    -matt
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  6. #15
    Senior Member JCinPA's Avatar
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    Matt,

    Thanks!

    I don't know exactly what pressure signs are. The spent brass looks fine, and the primers aren't mashed or anything.

    I didn't bring the chrony out today, like I wanted. Should I be worried about 43.5 grains? It's well below max published loads, and probably pretty close to factory.

    I wish I knew what pressure signs to look for.

  7. #16
    Senior Member madgunsmith's Avatar
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    Pressure Signs:

    1. Hard or sticky extraction;
    2. Flattened primers.
    3. Excessive casehead expanision.

    Take a look at your fired primers. The edges of the fired primer should still be round. If you reload cases that have been fired with excessive pressures, sometimes when you prime the case, you can feel a sloppy primer pocket. If you ever feel a sloppy primer pocket, retire the case and reduce your load slightly.


    Please post a picture of your fired primers. And take a look inside your loading manual. Inside you should be able to find pictures of flattened primers, etc.

    Mad

  8. #17
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    Ok, so these weren't match bullets, but they were shot with Nosler Accubonds which have a high BC for a hunting bullet. My rifle is a hunting rifle and that's what its used for. Specs: Ruger M77 MKII, 22" sporter, trigger tuned to 2 lbs, bbl floated, action glassed, Burris rings, Swift Premiere MD 4.5-14x44 (doesn't track worth a dang on CFs, but works great for rimfires!).

    Let's face it, if you're in a scenario, you're going to load whatever you have on hand. I hunt with .308" bore, but I do most of my target shooting with 6mm and 6.5mm. Anyway, here are the results with my my rifle and this years load development.

    165 gr. Nosler AB
    Win once fired brass
    Fed 215
    44.5 gr RL15





    Last years loads:

    165 Hornady SST/ 165 gr. Nosler Partition (don't remember which bullet for that particular group, they both shot about the same, but the SST has a much better BC).
    Fed GMM brass, once fired
    Fed 210 M
    44.0 gr. RL15



    The rifle before switching to the Burris rings:



    Kamrad Tylov


    "Tomorrow is the most important thing in life. Comes into us at midnight very clean. It's perfect when it arrives and it puts itself in our hands. It hopes we've learned something from yesterday."

  9. #18
    Super Moderator monteboy84's Avatar
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    Quote Originally Posted by JohnCollins
    Matt,
    Thanks!

    I don't know exactly what pressure signs are. The spent brass looks fine, and the primers aren't mashed or anything.

    I didn't bring the chrony out today, like I wanted. Should I be worried about 43.5 grains? It's well below max published loads, and probably pretty close to factory.

    I wish I knew what pressure signs to look for.
    Mad's advice should give you an idea of what to look for as he's more experienced than I. In my rifle the pressure signs were fine, but it really barked and when I pulled back my load the groups settled down nicely. The load you've got is probably alright, and judging from the groups you posted it shoots just fine as well 8) My load book is up at my folks' place with all my reloading equip, so when I head up there this weekend I'll let you know where I was at.

    The Gold Medal Match round I pulled apart had 43.2 grains of powder in it, and I've had multiple reports that the powder used in GMM is IMR 4064, so I would imagine your load is pretty close.

    -matt
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  10. #19
    Senior Member JCinPA's Avatar
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    Well, they extracted easily at the range. Here is the photo. I'm not sure what to look for, but they look normal to me. They are still seated just below or at flush with the back of the case and do not appear smashed. I can still see a bit of rounding over around the edge of the primer cup. These have now been reloaded once, fired twice.

    I found out Black Hills uses Winchester Brass, and someone else posted these may have just a smidgeon more internal volume than Federal brass. And 43.5 grains is right in the middle of the range from the IMR data pages (41.5-45.9 grs.):

    Cartridge: 308 Winchester
    Load Type: Rifle
    Starting Loads

    --------------------------------------------------------------------------------
    Maximum Loads
    --------------------------------------------------------------------------------
    Bullet Weight (Gr.) Order BW Powder Bullet Diam. C.O.L. Grs. Vel. (ft/s) Pressure Grs. Vel. (ft/s) Pressure
    --------------------------------------------------------------------------------
    168 GR. SIE HPBT 168 IMR 4064 .308" 2.800" 41.5 2518 43,800 PSI 45.9C 2766 58,800 PSI

    Considering how they shoot, and your data for the Federal GMM, I should be OK with this load??


  11. #20
    Super Moderator monteboy84's Avatar
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    Looks good to me, I think it's plenty safe, more than likely my Winchester just didn't like it :lol:

    -matt
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