I actually have 2 questions, 1 my data calls for 117gr hdy SPBT bullets and I have Sierra 117gr SPBT bullets are they the same or is there a difference? 2 what is the difference in H4895 and IMR4895?
ogives usually very on horn vs sierra-hornady being a more gradual taper and sierra using a double radius or some such.Imr4895 has a slightly faster burn rate according to the charts.DO NOT interchange the load data on these two powders!25-06 is closer to a magnum in the fact that it is an overbore capacity case-it generally works better with slower powders than 4895 of either manufacturer!To each their own-I used 4831 when I owned a 25-06 with fantastic results,with sierra 90s and 120s.
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