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Old April 18, 2019, 08:20 PM   #80
44 AMP
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Join Date: March 11, 2006
Location: Upper US
Posts: 20,502
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People aren't buying that gun because its a .38, they are buying a S&W 10, 15, 14, etc., and it happens to be a .38 Spl.
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That just doesn't make sense. The model number DEFINES the caliber in which it's chambered.
you missed my point. The people buying those older Smiths could buy any .38 spl, they're buying those S&Ws because they want those S&Ws

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Simply due to barrel length alone the velocity of Corbon 125 g ammunition would be 1153 fps at 2.5" and 1,000 fps (huh, nice round number) at 1.875"

The .357 magnum loses 153 fps simply due to barrel length.
Did you chronograph those numbers, out of your gun(s)?? or just take someone's word for them?



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Ruger 1 7/8 LCR yielded 1024, 1027
Ruger 3" LCRX yielded 1076, 1087

We are talking about 50 fps difference here! So not that much loss in 1 inch.
These were chronographed numbers, but it doesn't matter, really. Until you start talking velocity differences of over 100fps, you are within the normal range of different velocities from the same barrel length guns shooting the same ammo.

USUALLY the difference is small 50fps or less, but sometimes its not and I've see 100fps difference between different guns with the same barrel length,
so you cannot absolutely say X difference is due to different barrel length. It could just be due to a different barrel, period.

It's rare, but its not impossible for a 4" barrel to actually shoot a few fps faster with a certain load than an 8" one. You won't ever know, exactly what velocity YOU get with your gun and a given load unless you chronograph it. Other people's data will probably be close. The maker's data will probably be close. If its an exact match, its serendipity. But it could be 100fps different or possibly even more...Don't get hung up over a double handful of fps.
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