There are some new IMR powders with an SC suffix, which means short cut. I'm going to get around to experimenting with 8208
There are some new IMR powders with an SC suffix, which means short cut. I'm going to get around to experimenting with 8208
Phillip McGregor (OFC)
"I am neither a fire arms nor a ballistics expert, but I was a combat infantry officer in the Great War, and I absolutely know that the bullet from an infantry rifle has to be able to shoot through things." General Douglas MacArthur
Shots on a 20 dot target at 100 yds. using .308 in M14 type scoped rifle the end of last month. BL-C 2 with 168 gr smk and 210M primers work great. Every shot to the left has been attributed to a hitch in the equipment. I stuck a new unitized gas cylinder on the rifle the night before the shoot and neglected to polish the front band where it contacts the tensioner. Correction has been made and next weekend improvements should be noted.
This is a plot of the hits on the 1" targets for development purposes. Looks like I need to raise the elevation 1 click.
This is my current precision M-14. Bula Defense XM21 with Bula med weight NM Barrel. Almost all parts are Bula. Scope is MK4 LRT 8.5 - 25 all sitting in a JAE gen 3 stock.
Semper Fi
Art
Last edited by nf1e; 08-04-2016 at 02:08.
Have used both stick (4895IMR) & both BLC@ & WW748 (ball) for M1, M1A,& ar15, for over the course NMC and hunting. Have had no problem withloads.
Switched to the ball powder for ease of measuring through RCBS powder measure.
Phillip McGregor (OFC)
"I am neither a fire arms nor a ballistics expert, but I was a combat infantry officer in the Great War, and I absolutely know that the bullet from an infantry rifle has to be able to shoot through things." General Douglas MacArthur
Phillip McGregor (OFC)
"I am neither a fire arms nor a ballistics expert, but I was a combat infantry officer in the Great War, and I absolutely know that the bullet from an infantry rifle has to be able to shoot through things." General Douglas MacArthur
Sorry Para, that is just how I refer to them... didn't mean to confuse no one. I started with M2 Ball cases (Lake City 68). The Match is because I am using the Nosler Match bullets and I'm shooting them in matches. I should have said "My Match Loads" and left the M2 out of it.
"I was home... What happened? What the Hell Happened?" - MM1 Jacob Holman, USS San Pablo
IMR8208 was developed by DuPont in the mid-1960s to resolve the shortcomings of the Olin WC846 ball powder in use with 5.56 ammo at the time. It was truly an American success story. By the late 1960s, Olin finally sorted out the issues and the cheaper WC844 emerged as the standard 5.56 powder. 8208 was discontinued and surplused.
One or two lots of surplus 8208 became quite popular with the benchrest crowd. If memory serves, it was sold through Thunderbird Cartridge Company as TCC322. The small, short grain size was quite a revelation in that it metered very well- a great attribute to high speed factory loading and reloaders alike!
When the surplus powder was used up, Hodgdon was approached to start production of a replacement. ADI in Australia was tapped to develope and produce a modernized version incorporating the same attributes of Varget such as temperature insensitivity. IMR8208XBR was the result.
Loading data from Hodgdon shows the versatility of this powder which is slightly faster than 4895. Its slower burning cousins are Varget and H4350.
Last edited by Ken in Iowa; 01-08-2017 at 06:43.