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Effective Range of New .223 Rem

 
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Old 01-09-2011, 10:53 AM
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Re: Effective Range of New .223 Rem

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Originally Posted by 1100 Remington Man View Post
Here some thing I ran into a old book I have by Bob Hagel Game Loads & Practical Ballistics For the American Hunter. On page 48 .223 Rem Remington Model 788 24" bbl R-P cases weight 95gr. Remington 7 1/2 primer Temp 70 F 52gr. Rem Bench Rest HP H335 28gr. MV 3519 FPS. These loads were developed for bolt action rifles and were near maximum in the test rifle . Thay should be approached from 1-2 gr. below. They are not recommended for use in semiautoloading Rifles... He also talks elsewhere in his book how each rifle is an individual and how the Reloading Manuals do not show as hot of loads as he has worked up as it should be and when changing lots # of bullets primers or powder start over... A great book by the way. with lots of good info. I can't wait till I get my reloading dies and start loading my scope mounts are on the way from SWFA can't wait to get this rifle set up and start shooting.
He is correct, every rifle is different. Some will allow for higher pressures and some less than what a book will tell you. You will just need start at a modest load and work your way up until you see signs of too much pressure, my #1 sign is bolt lift. You will also find a fine line between accuracy and speed. I have been able to push my .223AI at 22-250 like speeds but at it seems to lose accuracy. 335 is a great powder, however I find temp effects it to much in most cases for my taste. My new favorite is 8208 XBR itís extruded and I see less variance with these types of powder then others. Iíll hunt yotes in 30 F. and PDís in 90 F. And have noticed loss/gain in FPS with 335 along with increase/decrease in pressure. But learning all of this is part of what makes it fun for me.
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