HELP.. Imr 4350 Swift Aframe 300 Grain .375 h&h Load Data

[uplander01]

71.5-76.5 according to loaddata.com. My guess would be 73 would get it done. My experience with swift bullets is they don't like to be moving super fast with maxed out loads.

 

[uplander01]

I wouldn't assume the H and IMR data is interchangeable. Start getting close to 80 with IMR 4350 my guess is your going to be seeing signs of pressure.

 

[fourfive8]

NO, while they are close they are not interchangeable. Use the data published for each. My suggestion is to try H4350 instead of IMR4350- not to interchanged the data! H4350 is an extreme powder so is temperature insensitive.