Shawn Dodson
Member
- Joined
- Dec 28, 2002
- Messages
- 3,212
I took the day off work yesterday to hit the shooting range to chronograph a few .223 loads I'd worked up using H322.
I use H322 because I want to use one propellant between .223 and 6.8.
Way back in July 2007, before I relocated from Washington state to Florida, I chronographed Federal XM193 55gr FMJBT and Winchester Q3131 55gr FMJBT from one of my M4s. Five shot measurements of each showed an average velocity of 3083fps for XM193 and 3118fps for the Q3131.
Over the past 6-8 months I've built (among other things) a new reloading bench and I've finally gotten back into reloading. My Speer #12 manual shows a max charge of 24.5gr H322 for 55gr to achieve a velocity of 3158 from a 22" bbl. My Hornady 7th Edition manual shows a max charge of 23.1gr for 55gr to achieve 3100 fps from a 26" bbl. (I wasn't having any luck in my search for H322 loads that would allow me to reproduce XM193 and Q3131 velocities.)
Working up loads and shooting them from my M4 named "Fat Bob" (16.5" 1:7 bbl) (because "Skinny Bob" was clean and "Fat Bob" wasn't) the following charges produced the following average velocities:
22.1gr - 2576fps
23.1gr - 2730fps
24.1gr - 2839fps
24.5gr - 2910fps
24.8gr - 2943fps
25.1gr - 2989fps
25.4gr - 3052fps
25.7gr - 3068fps
26.0gr - 3100fps
My goal was to find a load with H322 that achieved between 3000 - 3100 fps from my M4s and then use that as my "standard 55gr load." At this point I'm probably gonna load up a few at 25.5gr H322 and call it good.
Cheers!
I use H322 because I want to use one propellant between .223 and 6.8.
Way back in July 2007, before I relocated from Washington state to Florida, I chronographed Federal XM193 55gr FMJBT and Winchester Q3131 55gr FMJBT from one of my M4s. Five shot measurements of each showed an average velocity of 3083fps for XM193 and 3118fps for the Q3131.
Over the past 6-8 months I've built (among other things) a new reloading bench and I've finally gotten back into reloading. My Speer #12 manual shows a max charge of 24.5gr H322 for 55gr to achieve a velocity of 3158 from a 22" bbl. My Hornady 7th Edition manual shows a max charge of 23.1gr for 55gr to achieve 3100 fps from a 26" bbl. (I wasn't having any luck in my search for H322 loads that would allow me to reproduce XM193 and Q3131 velocities.)
Working up loads and shooting them from my M4 named "Fat Bob" (16.5" 1:7 bbl) (because "Skinny Bob" was clean and "Fat Bob" wasn't) the following charges produced the following average velocities:
22.1gr - 2576fps
23.1gr - 2730fps
24.1gr - 2839fps
24.5gr - 2910fps
24.8gr - 2943fps
25.1gr - 2989fps
25.4gr - 3052fps
25.7gr - 3068fps
26.0gr - 3100fps
My goal was to find a load with H322 that achieved between 3000 - 3100 fps from my M4s and then use that as my "standard 55gr load." At this point I'm probably gonna load up a few at 25.5gr H322 and call it good.
Cheers!
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