Seeing as every one is talkking about the their issue with SMK or the boat tails being a POS it may soon be resolved hopefully (Which in all my 303's the SMK's work well) the new round is on the block it is a .311 174gn HPFB I have only really done very little work up with this as I went to the state shoot with a tried & proven load with 174 SMK's using my as issued No.4 I also won the as issued event so they do work. I was not going to go there with an untested zero I have only tried groupings compared to the SMK. If your pushed buy the Hornady 150gn Flat Base Soft Point at .312" which your local should have or one close by use the inter-net to find some they go pretty good to @400m I finished 2nd 2 years running in state shoots previously 2008 & 2009 using them the K-31 was just too good over the 2 consecutive days.
These bullets are made by The Bullet Factory look them up get in contact with them and see if you can get some they are .42c/AU each I would say international postage will be pretty stiff I brought 840 of them and it came in 2 packets that were quite weighty.
The 2 projectiles pictured the Bullet Factory 174gn Hollow Point Flat Base is on the left whilst the Seirra 174gn Matchking is on the right
I have a sniper shoot tomorrow using my 47C T and will report back how they go but like I said I have done diddly squat load development save for the same weight of 2209 I use for the SMK's and have set the ogive to the same as a MKVII round and crimp they just fit in the mag. You also have to allow for PWF when shooting
I have enclosed the pics of the only 25yd targets I have shot with PWF and this is all I have done no 100, 200, 300 up to 600 so cannot judge from the groups to be honest I may have to tweak the charge/jump/crimp/primers yet but for now just going with what I have used in the past with the SMK's then go from there its all I can do for now some one over east may have done more than I with these new projies.
Postscript ~ something more important came up so did not go shootingbut we have a sight in day this coming w/end so will try for that one with the Bullet Factory loads.