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MV; Rifle vs. Pistol

This is a discussion on MV; Rifle vs. Pistol within the Range Reports forums, part of the Gunner Forum category; FYI, if anyone's interested... Got to thinkin' about velocity differences between rifle and pistol the other day and, actually havin' a little time ( plus ...


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Old 08-23-2010, 10:13 AM   #1
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MV; Rifle vs. Pistol

FYI, if anyone's interested...

Got to thinkin' about velocity differences between rifle and pistol the other day and, actually havin' a little time ( plus bein' in a place to do somethin' about it! ). decided to do a very limited and informal check. Having a 6-1/2" 357 Blackhawk handy...and a 24" Marlin Cowboy in 357 handy as well, I grabbed a box of S&B 158 GR SP and fired a coupla' five shot strings.

Accordin' to the Chrony, th' Blackhawk ran about 1230-1240 fps, and the Marlin about 1530 or so....not very scientific but, hey, works for me!
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Old 08-23-2010, 10:35 AM   #2
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Re: MV; Rifle vs. Pistol

...great...I've always heard about 200fps...but you're the first time I've seen it verified...I know you hated to do all that shootin' but....for science, right?!!!



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Old 08-23-2010, 12:15 PM   #3
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Re: MV; Rifle vs. Pistol

That's a little over 16fps difference per inch of barrel. I'd guess there is a varible rate of gain as you increase the barrel length, but never seen anyone try that. And a optimal barrel length for each caliber & powder combo used. Plus between a rifle and a revolver you have additional loss from the barrel / cylinder gap that a closed breech won't have. In a hand gun I have read that 30fps per inch is expected, say from a 4" to a 7 " barrel.
Still, it's a good reference to see the approx 300fps difference in your experiment.
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Old 08-23-2010, 12:20 PM   #4
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Re: MV; Rifle vs. Pistol

Thanks Jody!
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Old 08-23-2010, 01:44 PM   #5
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Re: MV; Rifle vs. Pistol

Interesting. I wonder though what the difference is at, 50 yards, and 100 yards?



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Old 08-23-2010, 01:59 PM   #6
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Re: MV; Rifle vs. Pistol

...OK, Jimbo...it's appx 300 not 200...try counting with hair between your toes...it's hard....



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Old 08-23-2010, 03:35 PM   #7
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Re: MV; Rifle vs. Pistol

That is about what I would expect from other comparisons I've seen. I would not be surprised if the velocity would be a bit higher from a shorter carbine barrel as these were loaded for handguns.
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Old 08-23-2010, 05:17 PM   #8
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Re: MV; Rifle vs. Pistol

You're welcome! And, yeah, Sheepdog, it WAS a burden but..you know, anything for th' guys!

Actually, when time, location, ammo n' th' right guns are available, I'll try some more. Wish I'd had a std Marlin 357 carbine available then but, hey, maybe next time. I do want to try some different .357 loads and if things go right, check th' .44 mag, carbine vs. revolver...
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Old 08-23-2010, 08:30 PM   #9
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Re: MV; Rifle vs. Pistol

...maybe Danny will send you one for a test gun...



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Old 08-23-2010, 08:51 PM   #10
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Re: MV; Rifle vs. Pistol

Hey Jody, come on up ta my house, got a couple of 45s to play with, just no chrony. Got a Marlin 1894 Cowboy 20", and a 3.50 & 4 5/8 Vaqueros I'd like to check out, may have to invest in one.
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Old 08-24-2010, 02:24 AM   #11
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Re: MV; Rifle vs. Pistol

Quote:
Originally Posted by sheepdog
...maybe Danny will send you one for a test gun...
Thatís funny, donít have a 357 carbine, but I should.
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Old 08-24-2010, 02:53 AM   #12
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Re: MV; Rifle vs. Pistol

...for science...yes, you should...



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