![]() Both will print under 1/2 inch groups at 25 yards with open sights and a solid rest.Of importance to me this load produces only moderate pressure compared to full power or factory loads. I have been shooting 55 speer soft points or 52 speer HPs. I knew I had seen some published info on loading 4227 in 223 and after going through a stack of manuals and old "freebie" handouts I finally found it.It was a 70's vintage Dupont IMR powder guide which listed 17.0 grns of IMR 4227 with 55 grn jacketed bullets as a Max load.As usual the handout advised starting 10% lower and working up.In my case I had to get up to 16.5 grns before obtaining 100% functioning in my new Smith Sport II.From my 16 inch barreled rifle this load produces around 2,550 fps with a standard deviation under 20 fps which is considered very good consistency. And it's established that Unique burns quite a bit faster than 4227.Ĭoleman I have a similar situation in that I had a few pounds of H4227 (generally considered a tad slower burning that the IMR version) that I wasn't using and had just purchased my first AR15. Good luck with whatever you choose to do,Ĭrusty Deary Ol'CootA multitude of people have been using Unique in the LARGER calibers for quite some time. My rifle is a 22" barreled model 700 Remington. In my limited experience using the faster than normal powders in a rifle have resulted in very accurate loads with less than normal noise. The faster than usual powders really shine in the shorter barrels where muzzle blast needs to be kept to a minimum. Many times I've found data for powders not usually used in rifles listed in the handgun or contender section of various manuals. I don't know if it will cycle an AR or not and the only way I know to find out is to try it. ![]() I have not chronographed these loads but guess them to be in the 2200 to 2300fps range. It will not produce top velocities in the 223. I did find data for it in 222 and worked from there. IMR published data for 4227 in 223 in the past. Last year I needed a reduced velocity-reduced noise load for my. Instant termination on close-in chucks, (i.e garden defense here on the farm), and it shoots to the same sight setting as my full-power 55 grain coyote load, so long as the range is under 80 yards or so. 223 loads do ring my bell - I've got one using a 50 grain HP and 7.5 grains of Red Dot that gives 2100 fps and is hardly any noisier than a high velocity. (Always like to get confirmations of the model.) Jeff, have you actually Chrony'd that load? If it's a 24 inch barrel, that's exactly what QL says it should be. So I'm also thinking that trading it off is a better solution. It can be done in the model, but it's not simple, and without the model I wouldn't try it at all. Tuning the load to get the right gas pressure at the port would have to take precedence over tuning for accuracy or velocity. The fact that 4227 is a fast-for-caliber burner makes it problematic for gas-driven semi-autos, though. In a single shot or a bolt gun you can work up a load in the model and then try it in the gun. There's where the Quickload software does wonders, especially in these days of powder famine. Problem is there's little or no published data to work from. I shoot 13gr under a 55gr cast boolit for 2300fps.Agreed, it's a good reduced-load powder for. 44 that would make you a trade for something a bit more suitable in the. 22 Hornet range - nothing wrong with that if it rings your bell -, check around, maybe you could find someone with a. 223 shooting at velocities barely in the. However, Jeff has indicated that he has found a use for the powder, although my data shows it to be a very sedate velocity when compaired to "normal". Scanning the burn rate chart, it appears that the IMR4227 is considered to be on the fast side of burn rate as compaired to the many powders listed in the load data portions of the loading manuals. The powders available to the handloader today is huge, the burn rate chart in the recent Hornady book totaling, 146 in number. 223, it is clearly not considered an optimum choice by these companies. I have just went through 6 reloading manuals (Hornady, Speer & Nosler), 2 being recent and the oldest going back to the Speer #10 and the Hornady 3rd addition and none of those books list IMR 4227 for the. If your reloading I would assume that you have a number of them, maybe dating back to older issues. Not to be smart here, but what do your reloading manuals say.
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