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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
How to over come overbore?
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<blockquote data-quote="Guest" data-source="post: 64248"><p>My limited experence has led me to beleve that slower burn rate powder will work.Example 7mm rem. mag clasic load of 79.5 gr of H870 produces 3100 fps in a 26"barrel,Ruger#1 Accuracy is 1 moa. Another of my experements with a 300 win mag using a surplus powder that was only available hehe in Utah. Ireco 85 Ball powder very slow burn, 84gr behind a 180gr Sierra game king,Fed215 primer,velocity 3200fps 5/8" group 5 shot @100 yds. This is out of a Browning Stainless with the Boss system.This load was pressure tested at Barnes an was at 59100 psi, sammi max is listed at64000psi. With a 300yd zero the drop is -8"@ 400yds. Energy figures to be over 4000 ft lbs more than my .338 win.I found that a premimum bullet would be a better choice fo elk. /ubbthreads/images/graemlins/cool.gif</p></blockquote><p></p>
[QUOTE="Guest, post: 64248"] My limited experence has led me to beleve that slower burn rate powder will work.Example 7mm rem. mag clasic load of 79.5 gr of H870 produces 3100 fps in a 26"barrel,Ruger#1 Accuracy is 1 moa. Another of my experements with a 300 win mag using a surplus powder that was only available hehe in Utah. Ireco 85 Ball powder very slow burn, 84gr behind a 180gr Sierra game king,Fed215 primer,velocity 3200fps 5/8" group 5 shot @100 yds. This is out of a Browning Stainless with the Boss system.This load was pressure tested at Barnes an was at 59100 psi, sammi max is listed at64000psi. With a 300yd zero the drop is -8"@ 400yds. Energy figures to be over 4000 ft lbs more than my .338 win.I found that a premimum bullet would be a better choice fo elk. [img]/ubbthreads/images/graemlins/cool.gif[/img] [/QUOTE]
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How to over come overbore?
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