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243 OCW test using H4350 Need opinions

 
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  #15  
Old 01-07-2012, 03:18 PM
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Re: 243 OCW test using H4350 Need opinions

I'm shooting a Savage model 11 with a 9.25 twist, 22" barrel, loading 105 A-max with 44.5 grs of Superformance, seated .003 of the lands, CCI LR200 primers, Win cases. MV 2970. Shoots .75 at 200yds. Shot 2 deer this season and the Amax past thru both shoulders at 300 yds. I don't think you will get to far past the 3000 fps with a 22" tube and maintain accuracy. If you run the numbers I should have no problems with a deer at 500 yds as long as I do my part. Good luck!!
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  #16  
Old 01-08-2012, 05:21 PM
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Update

Went back to the range with some more rounds. I loaded at the same OAL and the same bullet. I started at 40.3 and went up .3gr to 42.1. Still have the same extractor marks bu that is the only sign of pressure I have seen. I am not too worried about that. I am thinking about taking the 41.8 load and working on the OAL with it to gain accuracy. What do ya guys think?







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  #17  
Old 01-08-2012, 06:37 PM
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Re: 243 OCW test using H4350 Need opinions

I think your biggest issue is going to be barrel twist. I doubt you'll ever stabilize the 105's in a 1 in 9.25" twist.
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  #18  
Old 01-08-2012, 08:01 PM
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Re: 243 OCW test using H4350 Need opinions

In OCW terms the 41.2gr. group would be the "scatter group". According to OCW theory, if you go up 1 1/2%-2% in powder charge weight from the "scatter group" you will find another node or OCW group which is 41.8gr-42.02grs. Looks to me like you may have a winner at maybe 41.9grs. You should see what the group looks like at 300yds, though to see if you are stabilizing the bullet! In my quest for the perfect "OCW" loads or any other for that matter, you gotta shoot farther than 100yds. I do all my initial testing at 200-300yds, minimal! Of all the lessons I have learned at this site, that has been one of the best!
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  #19  
Old 01-08-2012, 08:06 PM
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Re: 243 OCW test using H4350 Need opinions

The range I use for load testing has a limit of 200yds. The closest range to me past 200yds is a little while away. Will I be able to see if they will stabilize at 200?
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  #20  
Old 01-10-2012, 12:04 AM
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Re: 243 OCW test using H4350 Need opinions

Here are my results from the chrono


40gr 3130 fps
40.3gr 3200
41.5gr 3230
41.8gr 3240
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  #21  
Old 01-10-2012, 12:27 AM
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Re: 243 OCW test using H4350 Need opinions

Either your chronograph is off or your about 10k psi over pressure. A 105 at 2.78" in a 24" barrel, I've seen strange things but that's in the territory of a 26-28" barreled 243AI with about 49grns of RE25, somethings a little off!
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