Jump to content

6.5 Creedmoor MV


Long Gun

Recommended Posts

Hello all,

               Just started handloading for my 6.5 Creedmoor: IMR 4350, 140 gr SST, loaded to SAAMI coal, out of a 25 inch barrel. Best I could get was 41.4 gr before I started getting definite pressure signs.

 MV was only 2520. This seems rather low to me but clearly can’t go higher due to pressure. Groups were superb though!

 

Does this sound about right to you guys?

Link to comment
Share on other sites

IMR 4350 is similar to H4350 and  load 42.1 grains with 142 grain SMKs and get 2850 fps from a 28” barrel with no pressure signs. 

I had a similar problem years ago when developing a load with H4895 and got pressure signs at a relatively low load. It turned out that the cases weren’t obdurating and this produced the same effect on the case head as over pressure signs.

You don’t mention which pressure signs you see but I would suggest that 2520 fps is low from a Creedmoor with a 25” barrel and Quickload suggests that you’d still be safe at 42 grains with the SST  bullet.

 

Link to comment
Share on other sites

Thanks for the reply. Pressure signs were cratering on the primers and heavy bolt lift.

 How did you overcome your obturation problem? I’m using virgin Lapua brass.

Also, I’m looking to move over to reloader 62 in response to the impending EU ban on everything.

Link to comment
Share on other sites

Archived

This topic is now archived and is closed to further replies.

×
×
  • Create New...

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy