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The Range
Ammo & Reloading
IMR 4320 and the 6.5x55 round
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<blockquote data-quote="milsurp2.0" data-source="post: 2028081" data-attributes="member: 24497"><p>Anyone else use IMR 4320? I've reloaded for years with it in the 8mm mauser and the 7.7 Arisaka and never had a problem. Recently got a M96 swede and loaded up 3 rounds with 39 grains of 4320 under a 139 grain soft point and had severe sticky bolt. Primers were flatter than I cared for. I checked headspace and checked for lug set back. Seems the IMR 4320 is prone to pressure spikes in bullets with a lot of surface area. I've looked around on the net and found a few instances of other people experiencing these pressure spikes. Strange. Just thought I would pass this on even though 4320 seems to be going the way of the dodo bird.</p><p></p><p><a href="http://forums.gunbroker.com/topic.asp?TOPIC_ID=318262" target="_blank">http://forums.gunbroker.com/topic.asp?TOPIC_ID=318262</a></p></blockquote><p></p>
[QUOTE="milsurp2.0, post: 2028081, member: 24497"] Anyone else use IMR 4320? I've reloaded for years with it in the 8mm mauser and the 7.7 Arisaka and never had a problem. Recently got a M96 swede and loaded up 3 rounds with 39 grains of 4320 under a 139 grain soft point and had severe sticky bolt. Primers were flatter than I cared for. I checked headspace and checked for lug set back. Seems the IMR 4320 is prone to pressure spikes in bullets with a lot of surface area. I've looked around on the net and found a few instances of other people experiencing these pressure spikes. Strange. Just thought I would pass this on even though 4320 seems to be going the way of the dodo bird. [url]http://forums.gunbroker.com/topic.asp?TOPIC_ID=318262[/url] [/QUOTE]
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The Range
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IMR 4320 and the 6.5x55 round
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