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SBR 240 JHP Chrono Results

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jw4570 View Drop Down
Callahan's Auto Mag
Callahan's Auto Mag


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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Topic: SBR 240 JHP Chrono Results
    Posted: 09 Nov 2017 at 12:02am
Everyone,

I fired the SBR 240 gr JHP ammo in 3 different length Automag Barrels, 6.5, 8.5, and 10.5.  The 8.5 and 10.5 are non-vent rib barrels.  For fully disclosure, the 8.5" is Magnaported, the others are not.  All were TDE era barrels fired on TDE frames.

Results in feet per seconds (fps) (sorry Luc and our metric friends), 5 shots each barrel

6.5" Vent Rib
1372
1341
1390
1371
1368
Average is 1368.4

8.5" (Magnaported, non vent rib)
1459
1444
1443
1470
1454
Average is 1454

10.5" Non Vent Rib
1529
1562
1528
1555
1546
Average is 1544

So it looks like 2" gets you about 90 fps.

Obviously this is from a single box, a single lot, and is not any kind of representative sample.  It's just to give everyone an idea of where the velocity is.  The 6.5 and 8.5 barrel functioned great, the 10.5 not so much, but I really don't shoot that 10.5 barrel much and I don't remember if it functioned with the same loads or not.  I just shot it for the velocities.  The 6.5 is my shooter.

Just FYI

Jason




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Luvz2Shoot View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Luvz2Shoot Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2017 at 1:33am
Thank you for the info. and the post.
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desertmoon View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote desertmoon Quote  Post ReplyReply Direct Link To This Post Posted: 09 Nov 2017 at 3:11am
Great to know!!!  Thank you!!!
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Mark F View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mark F Quote  Post ReplyReply Direct Link To This Post Posted: 23 Dec 2017 at 7:02pm
Jason,
Can you post some pics of your barrels?
My 10.5 TDE works very good and my 6.5 is magnaported with VR.
Thanks for the numbers; they are very impressive.
THX
Mark F
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jw4570 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jw4570 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Jan 2018 at 11:05pm
Do  I have to host pics somewhere else, or can I upload them here?  The link at the top on "How to post pics" isn't working.

Jason
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Luc V. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Luc V. Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 2018 at 8:38pm
Originally posted by jw4570 jw4570 wrote:

Do  I have to host pics somewhere else, or can I upload them here?  The link at the top on "How to post pics" isn't working.
Jason
 
Hi Jason, you can upload the pictures here to the site.
I just tried the link on "how to post pictures" and everything seems to work fine here.
 
Luc V.
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