300 AAC Blackout

[gadabout]

Did like 45 of these yesterday and today. I had 45 brass and 50 125g FMJ but had to buy IMR 4227 which I haven't used in like 20 years or so. I did like it for something for 357 mag or the like. I just can't remember and it's not important anyway. I could work up a load for 10mm but not sure of a starting point and data is scarce. Something to think about anyway. I can use it for 300 blackout as the holster guy loves it if it shoots good!!  Craig

[The_Shadow]

IMR 4227 is too slow for 10mm and would need an heavy crimp to ignite well. 

[gadabout]

Thanks Wade. I can't even find data for 357 so I may have not used it for that. It must be a real slow powder as a starting point is 15.7g for 125g bullet. Oh well if it works and it should I can just use it for 300 blackout.  Thanks again for your input.  Craig

[blaster]

you would have been better off if you could have gotten some H-110.

[gadabout]

I have used Little gun for years but couldn't find any. Thanks  Craig

[oldman10mm]

4227 would have been used for 44 Mag. Hodgdon lists loads for 4227 and 125gr.

https://www.hodgdonreloading.com/reloading-data-center?rdc=true&type=53

[The_Shadow]

Hey Craig have  look here at the Nosler website
https://www.nosler.com/load-data

https://www.nosler.com/300-aac-blackout

https://www.nosler.com/357-magnum

[gadabout]

Thanks all. Craig