quote:

Originally posted by olarmy:
Not accusing you of making stuff up, at all.


Original 4831, sold by Hodgdon, was surplus military powder. When that supply was depleted, Hodgdon introduced a similar replacement: H4831. From what I have read, the new 4831 is slightly faster than the original surplus military powder.

IIRC, DuPont introduced IMR4831 sometime on the 70s. It is between H4831 and IMR4350 in burning rate, but it was never "surplus".

There have been at least 3 powders from Hodgdon on the market designated "4831". The first as mentioned was the slow H4831 military surplus powder. Once this supply dried up Hodgdon continued to market H4831 but this was manufactured in Scotland for him (likely by Nobel). While it was supposed to be the same as the original Mil Surp H4831 most found it a little faster burning and was it fairly short lived as Nobel closed down their powder manufacturing business.

Dupont then produced their IMR4831 which was definitely a faster burning powder and not interchangeable with H4831 charges.

The Hodgdon H4831 powder now on the market, like most of the H designated Hodgdon powders, is manufactured by the Australian company ADI and in the case of H4831, is known as AR2213 or AR2213SC (short cut)outside of the USA.

The H/AR line of powders are temperature insensitive and H4831 aka AR2213 is very close in burning rate to the old original Mil Surp H4831 and in terms of load development, minimum or starting loads would be interchangeable as would be maximum loads respecting that each rifle is different.

This thread should have ended with Alf's own post of the Hornaday and Speer specs on the 175 gr. bullets at 2600 FPS with a number of powders!!! , Getting an additional 100 FPS over any reloading book load is a snap in a 26 inch tube, a tight chamber or a tight bore and especially with a long magazine and long throat and a bunch of H414 that bests any of the old Hornady or speer loads.

REST MY CASE and lets move on.