Any of you guys use IMR4198 or H4198 in a AR-15? If so what barrel and gas system, and what charge/bullet weight functioned for you
Any of you guys use IMR4198 or H4198 in a AR-15? If so what barrel and gas system, and what charge/bullet weight functioned for you
Tried once and got too much bridging across the mouth of the case making a mess. IMO there are a lot better powders to use for 223.
Expect good results may be had w a 300 BLK
I did run IMR4198 in Colt M16A1 carbine, 14.5" barrel, with 55 gr fmjbt bullets. No issues. 20.5 grs. The carbine has a different port size & location, then their rifle. . The AR15 port size is different between manufactures. The port pressure must be correct to work the action.
IMR4198 also worked in Ruger Mini-14 & old Armalite AR 180 , 5.56.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |