#Subsonic 223 imr 4227 free

These latter powders are great +P powders for modern revolvers and lever guns so chambered and I thought it might follow that this powder might be well suited for it as well. 45 Colt since the burn rate is so close to H-110, W296, as well as H and IMR 4227. I've never gotten around to using it though I was considering it in the. I have been sitting on a pound of SR 4759 for about 5 years. 30-06 if the recoil was eased into a little. I have two daughters who might just take a little more of a shine to the. Has anyone tried either of these powders for subsonics in 308?Īnother great post.

Thought is that one of these may be the ticket for 220 RN in a 1-10' barrel. They list data for a lead bullets in 308 Win:

Superior ignition characteristics make 5744 an excellent choice for reduced loads in many rifle calibers and in large capacity black powder cartridges such as the 45-70 through 45-120 and 50-90 through 50-120. It is characterized by excellent ignition and consistency over a very wide performance range. This unique powder can be used in a wide range of rifle calibers and magnum handguns. Very consistent, not temp or position sensitiveĪccurate Arms XMR 5744 looks like it could also work.Īn extremely fast burning, double-base, extruded powder. I also found this in our Reloading Depot: They only list Trailboss for reduced loads also, not for subsonics. They have reduced load data for 300 Savage:ġ80gr. Its large grain size gives good loading density for reduced loads, enhancing velocity uniformity. This bulky powder really shines as a reduced load propellant for rifle cartridges. When browsing the IMR website, one of the slower pistol powders caught my eye. The downside is that powder charges will be larger and a larger volume of gas will be produced, which may make the load slightly louder than one using a fast pistol powder. This should, in theory give better consistency. I think the solution to better consistency with subsonics in standard length 308 barrels is the use of a slower burning powder that will continue to push the bullet for a longer length of the barrel. Lube is reducing that friction and making it less of a factor. The friction can vary a lot as the bore expands thermally and/or becomes fouled. What that says is that the fast burning pistol powder is only pushing the bullet for a short length of the barrel and then all that the bullet is seeing is friction. The fact that lube of some form (oil, wax, moly, hBN) will make the load consistent, logically says that case capacity is not the issue. Case capacity only limits powder choice due to SEE. I don't believe the lack of consistency has anything to do with case capacity.

But, I don't consider that to be reliable consistency. I get good groups if I disregard the CBS and shoot the group quickly right after. SDs can get horribly bad depending on how long the barrel sits between shots. Without it, the first round takes a big dump (CBS or letting the barrel cool). under 16.25 for a Whisper), you need some form of lubrication in order to get consistency. What I have found is that in a longer barrel (over 20' typically for a 308 vs. Hornady A-Max's.Ok, before people start coming out of the woodwork saying: 'Trailboss, Trailboss, Trailboss.' I've been around the block with fast burning pistol powders in subs (including Trailboss). Winchester Powerpoints I could use for this, as well as some 69gr. offering that EBR must be using is the soft point 'Varminter', which doesn't even utilize a boat tail and has a very low B.C. but then I looked and seen that the Gameking is offered in 65gr., not 63. so I assumed they were using the 'Gameking' rounds, which are match-grade hunting versions of the Matchking. soft point rounds, and EBR calls them 'match'. I see the EBR rounds are loaded with Sierra's 63gr. I've never tried to wrap my brain around this subject, I've always decided that if I needed a truly silent weapon, I'd stick with something in. Or what about using a very slow burning powder, such as RL-19, RL-22, or even slower? This would fill the case more with powder, but keep velocity low.

#Subsonic 223 imr 4227 free

pills to help with the problem of free space in the case? I was thinking of perhaps using the 80 or 90gr. He's shooting a 16' RRA with a 1/7' twist. I know this topic has been kicked around many many times, and I have tried the search function before posting, but can't find the data I am looking for.Ī friend of mine just got a suppressor, and he wants me to load him some subsonic ammo, for s's and g's basically.