I have tight necked (.291") 6.5x284. Pet load for 142SMK's is 48.5g of 4831SC in Lap case, which gives me 2764fps on 26inch Kreiger barrel. Ave groups are in the .4's at 300yds so I can live with the "low" velocity. [img]/ubbthreads/images/graemlins/wink.gif[/img] Take care when working up, I started at 46g 4831sc and prepared loads upto 53g. There was absolutely no pressure signs at 51.5g but 1/2 grain more showed a flow of brass into the extractor [img]/ubbthreads/images/graemlins/shocked.gif[/img]
I have some 4350 that I have yet to try and some of the other Brits who have them use Vit170 but I havent any info on powder weights. I have a pal who has Quickload, who recons that RL22 is the way to go for load density, again no personal knowledge. [img]/ubbthreads/images/graemlins/laugh.gif[/img]
Really appreciate all this info. Sure will make my life easier this week as I develope a load. Just want to get one good load and stay with it for some deer hunting at long range.
The new Cooper seems to have broke-in with eight or nine shots. About that point the number or cleaning patches dropped significantly, carbon was gone after only four patches, not much copper in the bore. Recoil with the 44 grain load is very mild, just wanted a break-in load. Obviously I will have to work up higher to get the velocities some of you guys are shooting.
Thanks again, more info the better so if anyone else has something I would appreciate seeing it.
my cooper varmint in 223 came with a one hole group target
so i phoned cooper and they gave me the load data, wery nice of them hard to improve on the load they had workd up
for this beautyful rifle. Unless a person wants to use
a differn't bullet.
Always did like the fat ones Barrels that is !!
Hi Ian. Here's another load you may want to try if you'd like to go with something lighter than 140 gr range. I load 120 gr Ballistic Tip over 46.0 H4350, and CCI 250 mag primer, out of Lapua case. I haven't clocked it, buddy shot my chrony with his .22-250. It destroys groundhogs, and so far deer out to 600 don't have a chance. [img]/ubbthreads/images/graemlins/grin.gif[/img]
I used to load 142 MKs over 46.0 RE 19, and same primer and case, but it didn't do too hot on live critters. Hope this helps some.
I cannot accurately answer you question, but have just returned from the range,with my 6.5x284. Whilst there, I shot both a 142 SMK and 140 Berger VLD into a 24 inch thick "sandwich" of dry chip boards. I wanted to know the suitability of either for deer sized game, particually expansion and how well they held together when they hit something relatively hard. The SMK penetrated 19inches and retained 124g, showed good expansion (twice diameter) and still had the base and lower section of the jacket attached to the lead core. 140 VLD not as good, retained only 115g and showed core separation, there was a "blow up" in the first 4 inches it had passed into the boards and it then travelled a further 6 inches. Not really an objective test I know but you asked so there's my answer [img]/ubbthreads/images/graemlins/wink.gif[/img]