Like most compact cartridges the 10mm does not gain much from longer barrels. If you look at the chart, the 12 to 14 inch barrels produce higher velocity than the 18 inch barrel.
![[image]](images/uploaded/202008271407055f47be09f24c5.jpg)
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10mm velocities from short to longer barrels
- Jim Taylor, 2020-08-27, 07:08
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Would a slower powder help regain some in longer barrels? (nm)
- Asa, 2020-08-27, 12:28
- It won’t hold enough of it. AA1680 too slow - WB, 2020-08-27, 14:17
- Thanks for that Jim, I forgot about that website. (nm) - Amede, 2020-08-27, 09:24
- I have looked at these a few years - Sid R, 2020-08-27, 08:46
- Kind of underwhelming, same as a 1873 Winchester in .44 WCF - WB, 2020-08-27, 07:35
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Yes , very common for that to happen with straight wall
- Sean Harper, 2020-08-27, 07:33
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I know some are biased but...
- WB, 2020-08-27, 09:58
- "LilGun with a 200 gr. would simply blister" - MountainWanderer, 2020-08-28, 10:06
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I know some are biased but...
- WB, 2020-08-27, 09:58
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Would a slower powder help regain some in longer barrels? (nm)
- Asa, 2020-08-27, 12:28