For the 142 gr. SMK I planned to consider some thing new, so I purchased up a pound of Hodgdon/Hornady Superformance powder. Superformance powder advertises better velocities for provided cartridges. I’ve under no circumstances shot it, so chose to give it a shot.
Sorry i don't have vel. readings on loads. The Be aware ebook with notes are headed to Texas right now. I am gonna have him scan them and e mail me when he will get there.
Creation of IMR powders dates again in excess of two hundred decades when the corporation was originally founded by E. I DuPont. Obtainable for use in many reloading applications, the IMR series of powder is trustworthy by reloaders all across the globe.
All shooting was conducted susceptible from the bipod with a rear bag. A MagnetoSpeed V3 barrel mounted ballistic chronograph was used to evaluate muzzle velocity.
This evaluate wasn't to receive persons to really applying the things they are applying or will use. All over again a couple of guys looking for facts. Individually i shot the aged powder.
The Varget must be weighed as it would occur out of a 8lb container. The Benchmark I have four new 1lb containers.
If not this is just a unique powder. Possibly inside your guns it should be improved. Possibly not Because the gains are small. Can it be well worth shelling out far more for for many shooters? Nope.
Walt was contacted by the oldsters at Thunderbird Cartridge Firm to check out In the event the 8208 which they bought experienced any application for Benchrest capturing.
Not a brand name to rest on its laurels, IMR carries on to establish new powder formulas that happen to be progressively insensitive to weather conditions and temperature changes, have improved burn speeds, and contain additives that clear away copper bullet jacket fouling. Leading the pack when it comes to innovation is IMR 8208 XBR powder. This precise metering, Tremendous shorter grain rifle powder is perfect for cartridges just like the 223 Remington/5.56mm, 308 Winchester/7.62mm NATO, along with the 6mm PPC.
This allows nearly 8208 xbr 4% a lot more powder Room in the case and in lots of loads yields more velocity than conventional imr 7828. These types of hundreds are marked by having an asterisk in the info to point out wherever common 7828 will not likely fit. Grain form is extruded (stick)
We particularly dealt with your considerations in an interview with 8208 xbr Chris Hodgdon. He explained incredibly Obviously that it's not only a reblend of the current powder. It really is anything new, though it imr 8208 xbr does originate from the Australian maker of Varget, H4350 etc. Chris shared with us force/velocity information obtained above a big temperature assortment, and I am able to inform you which the pressure uniformity (from just one temp Intense to one other) was incredible as compared to Some other powder we’ve found info for.
This powder has the identical burn off fee as being the previous XBR but was designed 6 decades ago for your navy Along with the intention to get incredibly temperature secure. I have been utilizing it for 5 a long time in my .308 and experienced great outcomes.
Is there was a couple guys that needed to find out about it. This powder was brought back to interchange IMR getting away the IMR208BR powder they quite earning back again early 90's.
Regarding melt away level, Chris mentioned that IMR 8208 XBR is “a tad slower than H4895.” Chris verified which the powder’s exclusive traits are temp security within an ultra-extensive temperature range and a very broad precision window. Chris mentioned: “Jim Carmichael discovered he could go up and down [noticeably] in his charge excess weight as well as group measurement didn’t fluctuate.”