18inch 243 need ideas for powder

[tjonh2001]

i recently aquired a 18 in 243. i am planning on running 105amax out of the 8 twist barrel. im wondering if anyone has reloaded for a short barrel 243. im thinking of trying h4350 not sure how it will perform with a 18 inch barrel.

 

[sobrbiker883]

Re: 18inch 243 need ideas for powder

I'm gonna tag along for the ride, I'm interested in a gasgun application for 20"....

 

[5RWill]

Re: 18inch 243 need ideas for powder

+1 to what sobr said i've been wondering how a 18" .243 would perform. I haven't run any match bullets through our youth model, but my father has shot nosler 100gr partitions and 100gr SSTs both on varget and both shot extremely well. For alot of the .308 class cartridges varget seems to work, i've had good luck in my .308 and .260.

 

[Low Sioux]

Re: 18inch 243 need ideas for powder

I have a 600 remmy 18 in barrel. I get 2830 with a 105 amax and 41 gr of RL-17. That load was the first I tried w/ RL17and it shot well, so I cant tell you how much more room I have before it tops out. I have to admit RL17 and barrel life concerns me a bit, but time will tell

 

[tjonh2001]

Re: 18inch 243 need ideas for powder

reloader 17 was another though with the h4350. im sure i would get the most velocity with the reloader 17. this is a varmint rifle. so im not to worried about barrel life on this one.

 

[tjonh2001]

Re: 18inch 243 need ideas for powder

I tested reloaded 17 and 105 amax bullets. Simply awesome. I took it over 3000fps but the accuracy was at 2975. Out of an 18inch barrel it's a great little gun with good ballistics

 

[JCH]

Re: 18inch 243 need ideas for powder

I know around 40gr of H4350 should put you around 2750fps. Not sure about pressure at that load.

 

[Bacarrat]

Re: 18inch 243 need ideas for powder

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: tjonh2001</div><div class="ubbcode-body">I tested reloaded 17 and 105 amax bullets. Simply awesome. I took it over 3000fps but the accuracy was at 2975. Out of an 18inch barrel it's a great little gun with good ballistics </div></div>

How much powder?

 

[Jeremybj]

Re: 18inch 243 need ideas for powder

I used 39.5 grains of IMR 4350 with good luck in my shorty

 

[ggmanning]

Re: 18inch 243 need ideas for powder

rL 22 and Ramshot Hunter are what I use.