Having done a bit of digging into light loads recently, with Hodgdon suggesting that H4895 can be used for 60% of max loads, that would seem to be the critical area where they might not be interchangable.
Then I found this.
Having done a bit of digging into light loads recently, with Hodgdon suggesting that H4895 can be used for 60% of max loads, that would seem to be the critical area where they might not be interchangable.
Then I found this.
I've fiddled with light loads a bit and found that at 80% and above results are good but can burn a bit dirty when you go below that. I had seen Johns note in Handloader plus the original article. Originally my light loads were used as a low recoil target load in my .308. More recently as a light load in the .303 that lets cases last a very long time.
GPM.
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