Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Alliant load data vs. manual for 55 gr. .22-250

Discussion in 'Handloading and Reloading' started by 93LXRag, Oct 31, 2009.

Thread Status:
Not open for further replies.
  1. 93LXRag

    93LXRag Member

    Joined:
    Sep 22, 2009
    Messages:
    25
    Hi Everyone,

    This is my first post since joining and avidly following this forum a few months back. My question is in regard to load data that Alliant lists for the .22-250 Remington.

    I have been working on developing a load using the Hornady 55 grain V-Max and Alliant's Reloader 15. When I compared the Alliant website data for 55 gr. V-Max, I noticed that Alliant lists 37.5 grains of RL15. This seems to be siginificantly higher than the maximum of 35.3 gr. published in the Hornday No.7 book and the 35.5 gr. in 49th editoin of Lyman.

    Oddly, enough, the other recipies that Alliant lists for the .22-250 using RL15 matches what Speer has listed. I understand that there are variatoins across different manuals, but isn't 2.0 - 2.3 grains higher a little abnormal?

    I didn't know what you guys thought about the manufacturer's site data and how it compares to reloading manuals like Hornandy, Speer, Sierra and Nosler.
     
  2. rcmodel

    rcmodel Member in memoriam

    Joined:
    Sep 17, 2007
    Messages:
    59,082
    Location:
    Eastern KS
    Lyman #49 is using a 55 grain Sierra soft point.

    Speer is usually pretty close to right.

    Hornady always seems very cautious.

    Sierra is, or used to be hotter then anyone else.

    Nosler bullets can't really be compared to anything else.

    The bottom line is, every manuals data is going to be a little different because no two use the same test barrel, primer, case, and powder lot number.

    You just have to take the one you want to trust, start at the starting load, and work up.

    All Alliant data only lists a max load so you have to reduce it by 10%.

    rc

    rc

    rc
     
  3. 93LXRag

    93LXRag Member

    Joined:
    Sep 22, 2009
    Messages:
    25
    Lyman 49

    RC, I just looked again in my copy of Lyman. On both page 145 and 147 they list the V-Max. I always think of Lyman as a pretty good source.

    Thanks for your comments on the others!
     
  4. 1911Tuner

    1911Tuner Moderator Emeritus

    Joined:
    May 22, 2003
    Messages:
    18,550
    Location:
    Lexington,North Carolina...or thereabouts
    Different data results from the different conditions in which the load was developed. Some ballisticians use pressure test barrels, while others use an actual gun to develop the load.

    Because X grains of Y powder produced x velocity and y pressure in Gun A is no guarantee that it will produce the same numbers in Guns B and C. All it means is that that lot of powder with that lot of primers and that particular bullet produced that pressure and velocity in that gun on that particular day.

    Change one thing, and you get to start over.
     
  5. Ol` Joe

    Ol` Joe Member

    Joined:
    Feb 25, 2004
    Messages:
    2,087
    Location:
    michigan
    Alliant data uses Speer bullets in its development lately as the two companies are owned by AKT. The difference between Hornadies data and theirs is likely due to this, as is the similarity of Speers data which uses the same bullet.
     
  6. OrangePwrx9

    OrangePwrx9 Member

    Joined:
    May 30, 2009
    Messages:
    764
    Location:
    North of the Fingerlakes-NY
    Frustrating isn't it.

    I recently ran into the same thing loading H110 for the .357 mag. One manual's max load for the 158 JHP is a grain below the starting load for that same combination in another manual. The second manual then lists a maximum load two grains higher yet. This for a powder that EVERYONE tells you isn't safe if reduced. Same thing happens with W296 (and why not...it's the same powder).

    Richard Lee wrote in his first reloading manual that a compressed powder load (loaded heavily enough that the bullet compresses the powder) slows the burn rate of the powder substantially and allows much heavier loading than if the powder is loose in the cartridge. This may be what's happening. People are finding a pressure peak that's near max with uncompressed powder and list that as the max load. Other places go right to the compressed load and are able to load much heavier before they encounter max. pressures.

    Still, these are bright experienced people so you'd think they'd have a handle on this. In the long run it may be a matter of differing company policies with different legal department inputs.
     
Thread Status:
Not open for further replies.

Share This Page