IMR4227 45-70 Trapdoor Loads

[lightload]

I have several Lyman manuals listing IMR 4227 45-70 loads. I have this powder and Berry's 350 gr plated bullets and wish to produce 1200-1300 fps rounds. My question is in this caliber does IMR4227 display position sensitivity, incomplete combustion, or any other less than desirable behavior? Does using a dacron filler resolve any issues? Purpose is making a target load that can do double duty when used for hunting small white tail deer or hogs at 100 yards or less distance. Rifle is NEF single shot used by a 13 year old boy. Thank you.

I have Unique which will meet my needs, but I also have a large quantity of IMR 4227. I thought that because the 4227 is slower than Unique, it may be useful when increasing velocity higher than that obtained by 12 grains of Unique. I can find no information on 4227's usefulness. I'm giving a new NEF and 300 rds of ammo to a young cousin.

[NSB]

I’ve shot a lot of 4227 powder in both handguns and rifles. I’ve never had a problem with it in any load I’ve used. I’ve never had any misfires, delays, etc.

[Jal5]

I’ve used unique with my NEF single shot and never tried any other. 100yds or less and the recoil is less than a 20 ga. Slug to me.


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