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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
7mm Allen Mag test rifle finished.....
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<blockquote data-quote="7Rumloader" data-source="post: 76235" data-attributes="member: 3640"><p><strong>Re: wc872 burn rate</strong></p><p></p><p>b1g b0re I don't intend upon debating powder burn rates and mathmatical equations but here are some facts.</p><p>#1 Yes H-50 BMG is listed as slower than H-870.</p><p>#2 WC872 is stated as being able to use H-870 data and AA8700 but My top end load for H-50 BMG was 100 grains behind either a 168 SMK or a 169.5 wildcat and on hot days ( above 85 ) will show pessure ( developed that load during the cold months ). So far I'm up to 102 grains of WC872 with the same bullets and have reached the <u> <font color="red"> </font> <strong>same velocity</strong> </u> <font color="blue"> </font> as H-50 BMG but have not gotten any pressure signs what so ever! I intend upon going up with the powder once again to wherever I get the best results or pressure signs. This tells me it burns slower than H-870, AA8700, and H-50 BMG powder since I have exceeded the previous load data for each powder by 2 full grains already.</p><p>#3 Kirby and jwp 475 also found the WC872 to be a slower burning powder in their tests by exceeding H-870 load data by a good margin along with H-50 BMG data as well.</p><p>#4 As far as barrel heat I have not used any hi tech device to measure it but when you can feel a difference by grabbing the barrel after 3 shots of the same bullets only different powder then there must be a difference. True I have not reached max level of WC872 yet and when I do there may be no noticable barrel heat difference at all and when I get there I will say I found no noticable difference in barrel heat at max loads for each powder. Right now it's a night and day difference between the 2 after 3 shots The BMG I assure you that you will turn it loose shortly after grabbing it and the WC872 you can hold with no pain or teeth gritting for as long as you want.</p><p></p><p>Like I said I don't want to argue mathmatics because I hated frieking equations and formula's in school and I don't like them any better now.</p><p>I'm only stating facts that I have so far and when I get more data collected on this subject I will share it over on a thread of mine in equipment reviews titled Wildcat bullets consistency and accuracy.</p><p></p><p>I'm through hijacking Kirby's wonderful thread about his new Allen Mag.</p><p>Sorry for the Hijack Kirby, Len, Dave, Ian ! /ubbthreads/images/graemlins/frown.gif</p></blockquote><p></p>
[QUOTE="7Rumloader, post: 76235, member: 3640"] [b]Re: wc872 burn rate[/b] b1g b0re I don't intend upon debating powder burn rates and mathmatical equations but here are some facts. #1 Yes H-50 BMG is listed as slower than H-870. #2 WC872 is stated as being able to use H-870 data and AA8700 but My top end load for H-50 BMG was 100 grains behind either a 168 SMK or a 169.5 wildcat and on hot days ( above 85 ) will show pessure ( developed that load during the cold months ). So far I'm up to 102 grains of WC872 with the same bullets and have reached the <u> <font color="red"> </font> [b]same velocity[/b] </u> <font color="blue"> </font> as H-50 BMG but have not gotten any pressure signs what so ever! I intend upon going up with the powder once again to wherever I get the best results or pressure signs. This tells me it burns slower than H-870, AA8700, and H-50 BMG powder since I have exceeded the previous load data for each powder by 2 full grains already. #3 Kirby and jwp 475 also found the WC872 to be a slower burning powder in their tests by exceeding H-870 load data by a good margin along with H-50 BMG data as well. #4 As far as barrel heat I have not used any hi tech device to measure it but when you can feel a difference by grabbing the barrel after 3 shots of the same bullets only different powder then there must be a difference. True I have not reached max level of WC872 yet and when I do there may be no noticable barrel heat difference at all and when I get there I will say I found no noticable difference in barrel heat at max loads for each powder. Right now it's a night and day difference between the 2 after 3 shots The BMG I assure you that you will turn it loose shortly after grabbing it and the WC872 you can hold with no pain or teeth gritting for as long as you want. Like I said I don't want to argue mathmatics because I hated frieking equations and formula's in school and I don't like them any better now. I'm only stating facts that I have so far and when I get more data collected on this subject I will share it over on a thread of mine in equipment reviews titled Wildcat bullets consistency and accuracy. I'm through hijacking Kirby's wonderful thread about his new Allen Mag. Sorry for the Hijack Kirby, Len, Dave, Ian ! [img]/ubbthreads/images/graemlins/frown.gif[/img] [/QUOTE]
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7mm Allen Mag test rifle finished.....
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