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Posted October 6, 2013 To establish a load one can utilize the relative melt away rate chart around the Hodgdon web site. Superformance here is detailed as slower burning than H4831. I've began out with Superformance loads that are two grains below These outlined for H4831 and searched for overpressure signals for example flat primers, difficulty extracting the situation or expansion of the case head.
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I not too long ago chronographed loads with two additional powders and Barnes two hundred grain TTSX BT bullets. adequate data had been received for an addendum into the loading data table posted above. Here's a summary of the new data not but additional to the first table:
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. also to not use as a equivalent equivalent powder reference from a large experienced explosives manufacturer? I do think not.
Ballistically, this Intense Extrude powder is the precise copy of H4831. Physically, it has a shorter grain sizing, hence, the designation SC or short Minimize. The shorter, a lot more compact kernels enable the powder to stream throughout the powder measures additional smoothly, assisting to reduce the constant cutting of granules.
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for those who Examine a burn rate chart, you will see that most of the examined powders are a bit quicker than 4064 and Varget. The 358 Hoosier is shortened and also the shoulder is pushed back again, cutting down circumstance ability plenty of that more rapidly-burning powders will deliver better velocity.
I've got 2 lbs of these things (VV Tin Star) from EoT 2011 I might prefer to use but reloading data has up to now eluded me. Otherwise, TB is my smokeless option for all The explanations DJ talked about.
I've bought two lbs of these items (VV Tin Star) from EoT 2011 I'd like to use but reloading data has to this point eluded me. Otherwise, TB is my smokeless choice for all The explanations DJ outlined. backlink to comment
Now I have listened to stories which the two powders are exactly the same just have a different label slapped to the bottles.
I'd personally consult a great loading handbook on all my powder selections and load data. And today, most powder producers have their loading data on line.
Bottom line, Superformance achieves excellent velocities in the .270 get that are extremely close to Individuals noticed in .270 WSM Barnes Vortex ammo. need to anybody determine to do that powder get it done only in cartridges for which There exists published data making use of H4831, and do not exceed the load quoted for H4831. actually start with charges which can be 5-10% reduced and Look ahead to tension indicators.