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 COL Question 
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Location: Bothell
Joined: Wed May 24, 2017
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Regarding COL. On the Western Powders tables it states the minimum COL, but not a maximum. What is the maximum on 10MM? I did not see it in SAAMI info either.

On .45 I ended up just measuring some store bought Blazer Brass and found it to be roughly 1.27. When reloading .45 I just split the difference and load them at 1.25 (min is 1.234).

Input?


Sun Dec 01, 2019 10:30 pm
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Ensure the minimum measurement is met/exceeded. Longer is okay as long as they feed.

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Sun Dec 01, 2019 10:38 pm
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Location: Monte
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1.260”

The normally universally regarded “long COL” for 10mm with the standard 180gr projectile.

I believe SAAMI starts to figure PSI around 1.250 and I’ve seen some shitter bulk ammo clear out to 1.277.


Sun Dec 01, 2019 10:40 pm
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jukk0u wrote:
Ensure the minimum measurement is met/exceeded. Longer is okay as long as they feed.


Yes ... but In addition to feeding, you need to make sure:

- The bullet is not touching the rifling in the barrel when chambered.
- The rounds fit in the mag.
- There’s enough bullet in the case to hold it securely.

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Mon Dec 02, 2019 7:17 am
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MadPick wrote:
jukk0u wrote:
Ensure the minimum measurement is met/exceeded. Longer is okay as long as they feed.


Yes ... but In addition to feeding, you need to make sure:

- The bullet is not touching the rifling in the barrel when chambered.
- The rounds fit in the mag.
- There’s enough bullet in the case to hold it securely.


the mins and maxs are listed as one-in-the-same, so how many thousandths of variation is acceptable? You haven't answered the question, either then, MaPi.

OP: I guess you could gin up the hottest round you desire then paint a bullet, chamber it and extract to see if it's contacting.

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"I love Girl Scout Crack!" ~ usrifle

“A return to First Principles in a Republic is sometimes caused by simple virtues of a single man. His good example has such an influence that the good men strive to imitate him, and the wicked are ashamed to lead a life so contrary to his example. Before all else, be armed!” ~ Niccolo Machiavelli


Mon Dec 02, 2019 7:53 am
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Thanks everyone


Mon Dec 02, 2019 8:32 am
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As stated above. Max COL is 1.260"

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Mon Dec 02, 2019 2:36 pm
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