2013年9月11日 · Both H4198 and Australian-made IMR-4198 produce less gas port pressure than Canadian-made IMR-4198. H4198 and Australian-made IMR-4198 have trouble cycling most rifles, even at maximum loads. Canadian-made IMR-4198 will usually cycle most rifles using maximum loads, but sometimes it may not be strong cycling and it may not cycle every rifle.

2024年1月22日 · Hmm I am not sure about using IMR 4198. That powder seems a bit slow. I like using IMR 4227, about 16 grains behind a Keith style 250 grain bullet makes a good round. It's around 930 FPS and will take care of any game found in the lower 48.

2009年6月30日 · The new Hodgdon 4198 is a short cut. I used to use the old IMR 4198 in AR-15 loads where it was and is my SP-1's favorite powder. The new short cut is way nicer to work with. Suppose the long grain would give better bulk for our reduced loads but …

2013年10月6日 · I don't understand! Why play games trying to analysis the differences and using data from one powder for another powder? Use H4198 data for H4198 and IMR data for IMR 4198. Analysis of differences and using data for two powders would be like using doing an analysis of the differences between IMR 3031 and IMR 4064 and then using 3031 data for 4064.

2015年8月19日 · Either 18.0 grs. IMR 4227 or 24.0 grs. IMR 4198 have been my goto cast powder charges in 7mms and .30's for a long time. I'm still accuracy-testing 27.8 grs. IMR 4198 to get 1800 fps. with a #31141 from an 18" bbl .303 Brit. truck gun I built.

IMR IMR 4198 .311" 2.220" 21.2 1,917 42,200 CUP 22.5 2,070 43,600 CUP Hodgdon H4198 .312" 2.220" 22.5 1,947 33,600 CUP 24.5 2,122 39,800 CUP Assuming they are similar, and not the same, it looks like it's safe to use IMR data with H …

2014年1月18日 · 300 blackout imr 4198 h4198 recipe Anyone have a good load recipe for 300 blackout using 160 gr. lee .312 mould sized to .309 with gas check and powder coated. I'd like one using h4198 or imr 4198 as I have quite a bit of each.

2024年4月5日 · The IMR brand was first introduced under DuPont in the 1930’s. IMR is an acronym for Improved Military Rifle. The first IMR reloading powders included ever popular favorites IMR3031 (1934), IMR4064 (1935) and IMR4350 (1940). Each of these are still favorites with handloaders today! Hodgdon purchased IMR® Powder Company in October 2003.

2016年7月24日 · You cannot over-charge the .44-40 with 4198 or RL7 with any bullet seated to a length which feeds through the magazine, because with heavier bullets and increased seating depth at standard OAL, powder capacity becomes self-limiting. I use 22 grains of 4198 with a longer, 230-grain bullet.

2022年12月6日 · IMR-4198 vs. H4198 I've used a lot of IMR-4198 over many years in cast loads for various .30 caliber cartridges and the .32-40, .38-55, .45-70 and maybe others, but I've never tried H4198. For those of you who have used both powders, are accuracy results of the two powders about the same with comparable charges?