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matching the performance of factory weatherby ammo

 
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  #1  
Old 12-25-2012, 09:14 AM
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Join Date: Dec 2011
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matching the performance of factory weatherby ammo

after researching load data from the speers/hornady/nosler reloading books, it's seems you won't be able to duplicate the velocity/energy that weatherby factory ammo is loaded to. i've been reloading for my 7mmrm and 22-250 w/great success, but haven't started to for my 257/270/300 weatherby mags. it seems reloading and staying in the load ranges/grains would only result in decreased costs per round and decreased energy/velocity. don't need to reload for these weatherby calibers, as i'm completely content w/the factory ammo. all 3 shoot extremely well, to my standards, anyway. reloading for that particular 7mmrm was out of necessity, as grouping was terrible at 100yds(1.5-2.25") w/all factory ammo tried, and now .5-.75" w/handloaded 140 accubonds, at 3138fps avg. long question short, can the extreme velocity/energy coupled with great accuracy that weatherby ammo provides be matched safely? Merry Christmas to all!
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  #2  
Old 12-26-2012, 02:58 PM
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Re: matching the performance of factory weatherby ammo

So you are trying to get 7wby velocity out of a 7 rem mag, is that right? And do it safely and accurately?
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  #3  
Old 12-26-2012, 03:26 PM
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Re: matching the performance of factory weatherby ammo

no, perhaps i've confused everyone. i want to replicate/duplicate the 257 weatherby 100 hornady sp factory loads. based on the velocities given for particular loads in the hand loading books i referenced, they are not as fast as production ammo. is it likely that i can match those velocities with the exact same bullet?
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Old 12-26-2012, 04:50 PM
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Re: matching the performance of factory weatherby ammo

With the right powder,yes. With my 1/4" accumark I have matched and exceeded the factory velocities (not by much)with much better accuracy. With a shorter barrel in the vanguard maybe not.
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  #5  
Old 12-26-2012, 08:35 PM
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Re: matching the performance of factory weatherby ammo

I have noticed the same thing. The books don't show max velocities as high as Wby factory ammo. I'd guess that its pressure, the books are stopping before Wby is. QL shows you can get there but the pressure is higher. I've read that they use alot of MRP and RL22 in the factory 257-300 rounds.

Chrono some factory loads too so you end up comparing apples to apples.
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  #6  
Old 12-26-2012, 09:43 PM
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Join Date: Jan 2009
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Re: matching the performance of factory weatherby ammo

72.5 grains Re 22
100 grain bullets seted to 3.333 ( prefer ttsx)
215 primer ( or cci bench rest if you see pressure)

This will yield 3775-3800 fps and put a smile on your face every time you pull the trigger. Work up to this of course.
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  #7  
Old 12-26-2012, 09:57 PM
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Re: matching the performance of factory weatherby ammo

I get real good results with 68g H1000, 115g Berger hunting VLD. It puts me right at 3240fps with no pressure signs. I can ring out another 50-60fps but it shoots sub 1/2"MOA, most of the time better, and does it at all temps I hunt or shoot in. The very few factory loads we have tested fall 150-200fps off advertised speeds. I used to use RL-22, it would give great results in summer temps but would be unpredictable in cold temps.
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