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No5Mk1 chronograph results....

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Category: Reloading
Forum Name: Reloading .303 British
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Printed Date: February 21 2024 at 12:36pm
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Topic: No5Mk1 chronograph results....
Posted By: 303carbine
Subject: No5Mk1 chronograph results....
Date Posted: August 27 2023 at 9:28am
Has anyone chronographed the shorty No5Mk1 in comparison to the longer barrel  of a No4Mk1?
And what were the results? 

Posted By: britrifles
Date Posted: August 27 2023 at 2:05pm
I took a look thru Skennertons book and thru Reynolds book.  I couldn’t find muzzle velocity results from the No. 5 which seems a bit odd, perhaps I missed it.  One would think this would be a factor in deciding the barrel length, although for a Carbine for jungle use, the Mk 7 cartridge would still retain more than adequate velocity for intended ranges.  

The No. 5 barrel is about 7 inches shorter than the No. 4, so I would guess a muzzle velocity in the vicinity of 2320 fps for the Mk 7 cartridge. Perhaps one of our members has chrono’ed Mk 7 ammunition thru their No. 5 rifle. 

Posted By: Shamu
Date Posted: August 27 2023 at 7:44pm
About 200FPS shy of the full length, Instrumental at 10' with my handholds. (174 Gr Hornady IMR 3031)
Not sure with MilSurp Cordite loads though.

Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)

Posted By: gilgsn
Date Posted: November 17 2023 at 4:17pm
he!!o. Old thread but in case anyone wonders and finds this post:

No5 Mk1.


Posted By: Shamu
Date Posted: November 18 2023 at 11:16am
Pretty much what I discovered with mine.Thumbs Up

Don't shoot till you see the whites of their thighs. (Unofficial motto of the Royal Air Force)

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