Soft shehane fireforming load

Brad Y · Post by **Brad Y** » Fri Sep 20, 2013 3:37 pm

I read here a few reckon the idea of a softer fireforming load for 284W to 284S to reduce primer pocket loosening is a good idea.

I have some sierra 168's here and 2213sc to use- what sort of load is recommended? I was thinking around 54-55gr.

Thanks

IanP · Post by **IanP** » Fri Sep 20, 2013 7:44 pm

I use 162gr Amax's with 55.5gr AR2213SC for approx 2900fps out of a 32" 5R barrel. Fire forms the cases nicely and a good enough for club comps out to 600m with good accuracy.

Ian

lewis reynolds · Post by **lewis reynolds** » Fri Sep 20, 2013 7:47 pm

I use trail boss pistol powder in my shehane to fireform cases with a jammed projectile. works great with next to no barrel wear and tear 25 rounds only just warms the barrel

BRETT B · Post by **BRETT B** » Sat Sep 21, 2013 1:16 am

Brad , I have always used Winchester Large rifle primers to fireform as they are the smallest of all the LRP"s and will keep the pockets tight . I then use BR2 from then on with full power load once formed!!!

I get the feeling you are trying to sneak into the Queens with your new 284 eh!! :lol:

Brad Y · Post by **Brad Y** » Sat Sep 21, 2013 1:31 am

No mate it wont be chambered for another fortnight at least now. Im pretty much stuck with 6.5mm for one last year. Mind you if this trigger doesnt want to play the game I might be stuck with a nail and hammer to start these rounds off!

RDavies · Post by **RDavies** » Sat Sep 21, 2013 8:22 am

Lewis Reynolds and I both share 15gns of Trailboss with 180gn pills to form our cases without wearing the barrel or around 16gns with 168s. This gives about 2/3rds case fill and a nice quiet plinking load.

Brad Y · Post by **Brad Y** » Sat Sep 21, 2013 5:38 pm

Interesting. Rod do you know velocity of the trail boss rounds?

bruce moulds · Post by **bruce moulds** » Sat Sep 21, 2013 10:41 pm

if you want to reduce primer pocket loosening, you have to harden the brass.
the only way you can harden brass is to move it.
this means that you need enough pressure to move the case head a little bit, but not enough to do harm.
period.
keep safe,
bruce.

DaveMc · Post by **DaveMc** » Sun Sep 22, 2013 7:04 am

Bruce - Another theory I have heard is to create case wall grip. The first firing supposedly has less case wall grip due to the large gap between case and chamber. I am not sure about this but suppose it is feasible. If so I think it would not be so much about "less case wall grip" but perhaps that it is thrust further back before contacting the wall in the early part of the process. :-k

RDavies · Post by **RDavies** » Sun Sep 22, 2013 7:46 am

Brad Y wrote:Interesting. Rod do you know velocity of the trail boss rounds?

Brad, I'm not sure what the velocity is. I know they are supersonic, but not sure by how much.