.243 AI

[colin]

I need help . i have just started to try and work up a load for my new .243 ai rem 700 it has a 27" 1-9 twist barrel .i want to use 95 gr vld bergers .From the data i got of the reloaders nest site it said v160 with about 46.7 gr should give me the mv i was looking for,around 3200 fps) so i started at a 10% reduction at 42gr v160 lapua cases cci 200 lrp berger95 gr vld 5 thou into the lands .the first load showed a very good 5 shot group but as i increased the charge the groups got worse and at 44 gr i got some real pressure signs no chrono so i don't no the mv but i gess it was no where near 3200 as the charge is way of the max plus there is still a lot of cases volume left .do primers make a pressure difference . should i try a slower powder .Any help would be great .just to let you know i am not an old hand at home loading and need all the help i can get
cheers
colin

 

[2644ever]

Try Vihta's N560 instead, never got any good results in any cartridge with N 160, too unpredictable... With N 560 you'll reach the desired velocity and some more with lower pressure and less stress on the case. Good luck.And one last thing as I just reread your message, stay away from CCI 200's! They are hunting primers as far as I know! Try some real accuracy primers like Fed's 210 Gold Medal or CCI BR2,this one is hotter than the Fed) Take Care.

 

[Harold]

I use 41 grains of H4350,, cci benchrest primers

 

[Bobs243Ackley]

Hi Colin,

Another powder that you might want to try would be RL-22. It is one of the powders that is listed on Jeff Milender's website for the .243AI for the 95gr Berger VLD. You can find the link for it by going over to the .243 info. page on the left side of the home page. Go to the bottom and you will find the link or you can simply hit it here at www.angelfire.com/nd/243ackleyimproved and go the load data on his website.

Cordially,
Bob Blaine

 

[Rtheurer]

Ill have to agree with mister Blaine. My new load for the 243AI with as you are doing 5 thou off the lands. Im using 48.5 gr of R-22 at a speed of 3395fps. Now please work up to this!! this is a warm load in my gun. I still have some testing but this load netted .442. so it looks like I might be able to fine tune it a little more. Fed 210M Primers I was using. If you punch this into the Balistics Program it looks Pretty impressive. Good luck.

RussT