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OAL less than 1.260

Discussion in '10mm Reloading Forum' started by taxmann2, Sep 22, 2012.

  1. taxmann2

    taxmann2

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    Hi. I've loaded some rounds at 1.255. Is this too short? ALso, one round is at 1.252. Should I get as close to 1.260 as possible? I loaded xtp 180 grains on starline brass, at the bottom of the powder range. I think it was 12.2 of AA9.

    Thanks.
     
  2. Taterhead

    Taterhead Counting Beans

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    That's fine. If you are at starting loads, no worries. The important issue with COL is finding what works best in your gun. There will be small variances in COL due to how the seater stem fits with the profile of your bullet.

    Now if you do workups at 1.26 and then decide to go shorter, it will be important to back off the charge a bit and rework. If you are at 12.2 gr of A9 under a 180 XTP, then no worries at all. I don't seat 180s out to 1.26". HPs are usually 1.255. Others are 1.25". Shorter typically is easier for your gun to cycle.
     

  3. gofastman

    gofastman

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  4. 07hemi4me

    07hemi4me

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    I have only been loading for ~8 months so Im in NO way and expert, but 1.255" has been working great for me.
     
  5. taxmann2

    taxmann2

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    Thanks for the feedback. I am going to make some bigger charges this week and run some through the G20sf at the range. Looking forward to it.
     
  6. _The_Shadow

    _The_Shadow Ret. Fireman

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    The COAL can be different for several reasons, I load most of my 10mm stuff to 1.250" for best feed and function. Some bullets dictate shorter COAL's such as the WFN styles to improve feeding.

    People looking to gain a slight advantage of powder space while working near the upper edge of performance and load longer.

    The standard using most TC shaped bullets run 1.250"
     
  7. piperman

    piperman

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    I have been loading at 1.260" with 180 flat points. I was always told to load as long as you can. So I check mag, then chamber on a new load length, if it fits then I use it, if it won't cycle, or it doesn't chamber fully, I seat it a little deeper. Maybe I am wrong on that assumption. They always work, but I'm not sure on a handgun if this applies so much as it does on a rifle?

    Steve
     
  8. arthury

    arthury

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    I have used 1.255" for PP charge close to max and the spent cases looked fine.
     
  9. Kwesi

    Kwesi

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    I always end up with a range due to small variations in the components. I'm currently loading Precision Delta 180 gr FMJ's and this batch of bullets are the most consistent at 1.258. My expected range is 1.255 - 1.260. I have run a range of 1.250-1.260 with Power Pistol in the 8.6 gr. (Modern Reloading 2nd has 8.7 as max)
     
    Last edited: Nov 16, 2012
  10. arthury

    arthury

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    Not trying to challenge you but the Hornady 8th Ed says for 180gr jacketed bullets, the max charge for PP is 8.4gr.

    Or has this changed in the 9th edition?
     
  11. Kwesi

    Kwesi

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    Thank you for the accountability. I corrected my post above to state that 8.7 gr is max load in Modern Reloading 2nd! My original post that 8.6 was well below max was referring to others, here on the forum, that I respect that have loaded it to much higher without any over pressure issues.

    Thanks again for catching my mistake!
     
  12. MakeMineA10mm

    MakeMineA10mm * * * * Millennium Member Lifetime Member

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    I always aim for 1.256", because that is the dimension that is "set" as the normal load-to (OAL) length in the VihtaVouri manual. I found that having a few thousandths extra clearance made magazine loading/feeding easier and overall feeding was better - less chance of catching the bottom of the feed ramp, etc.