6mm CM vs 22 CM

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nso123

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• Dec 14, 2024

• #1

Given the same weight bullet, is there an advantage to a 6mm CM with a light bullet vs a 22 CM? Looking at load data there seems to be a couple hundred fps difference, with the 6mm CM being faster.

 

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srt-4_uk

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That's how it always works with cases that are the same general size.
Bullet weight being the same, the larger bore will be faster. The larger bore will also typically have a better barrel life. But the smaller bore will have a longer bullet meaning better BC.

 

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Supersubes

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There should not be that big of a velocity difference between them. Use a ballistic calculator like JBM to run the numbers.

 

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Birch7

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What are you using it for? A 95 smk over 3100 is great for recoil and wind, but with 38+ grains down a 22…not so much for consistency or longevity if you’re shooting matches.

 

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nso123

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Birch7 said:

What are you using it for? A 95 smk over 3100 is great for recoil and wind, but with 38+ grains down a 22…not so much for consistency or longevity if you’re shooting matches.

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It will strictly for a varmint rifle. Not worried about saving pelts.