Forums
New posts
Search forums
What's new
Articles
Latest reviews
Author list
Classifieds
Log in
Register
What's new
Search
Search
Search titles and first posts only
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
You ain't ever seen a 303 British like this before...
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="shaughn" data-source="post: 1243917"><p>In the No.4 MkI and the original SMLE MkIII (and other Mk's) the chambers are oversize, which can create artificial headspace and reduce case life significantly. This is more than enough reason to tread carefully when reloading.</p><p></p><p>The No.4 Mk 1 and it later bretheren are capable of handling the 7.62 NATO and have been successfully converted to said caliber and there has been no issues as far as I am aware with the pressure generated, remember NATO spec is not SAAMI, the ammunition is usually at the upper end of the pressure curve, since it has to be used in everything from service rifles to GPMG.</p><p></p><p>The 303 Mk VIII ball used a 175 gr spitzer and depending on weapon used the velocity was between 2525 fps - 2900 fps which should put the maximum pressure up in the 60,000 psi range, this round was intended for Vickers machine guns, but was considered acceptable for use in all .303 inch small arms and Machine guns, but the powder bullet combo had an adverse errosive effect on rifles/LMG that had previously used Cordite ammunition, so general policy was to restrict it to the "heavy" machine guns. </p><p></p><p>Snipers, once the ammunition became available, were known to get very friendly with ordnance personnel and Vickers machine gunners so as to be able to get thier hands on a reliable supply</p></blockquote><p></p>
[QUOTE="shaughn, post: 1243917"] In the No.4 MkI and the original SMLE MkIII (and other Mk's) the chambers are oversize, which can create artificial headspace and reduce case life significantly. This is more than enough reason to tread carefully when reloading. The No.4 Mk 1 and it later bretheren are capable of handling the 7.62 NATO and have been successfully converted to said caliber and there has been no issues as far as I am aware with the pressure generated, remember NATO spec is not SAAMI, the ammunition is usually at the upper end of the pressure curve, since it has to be used in everything from service rifles to GPMG. The 303 Mk VIII ball used a 175 gr spitzer and depending on weapon used the velocity was between 2525 fps - 2900 fps which should put the maximum pressure up in the 60,000 psi range, this round was intended for Vickers machine guns, but was considered acceptable for use in all .303 inch small arms and Machine guns, but the powder bullet combo had an adverse errosive effect on rifles/LMG that had previously used Cordite ammunition, so general policy was to restrict it to the "heavy" machine guns. Snipers, once the ammunition became available, were known to get very friendly with ordnance personnel and Vickers machine gunners so as to be able to get thier hands on a reliable supply [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
You ain't ever seen a 303 British like this before...
Top