243 Winchester 1:10 twist long range load

[QuietTexan]

What's your barrel length? If 24" or longer yeah, I'd run a 6-10 shot ladder to see if you get better velocity from it compared to the RL-17. 243 Win is an overbore cartridge, so slower powders can work well. The case fill is so low with common powders there's a lot of room available, and if you seat out past book COL or 2.680" or SAAMI max of 2.710" you get even more. I was at 2.735" COL sat 0.020" off with 90gn Nosler BTs.

Alliant lists 48gn max at 2.625" COL for Speer 90gn spire points. If you have a long enough throat and a long enough barrel it could work well. Starting load would be dependent on your COL, and I would expect you to run out of room before you hit pressure but be careful about it, especially if you're seating long.

The 243 is about as overbore as a 7SAUM, it gets unfairly maligned as a women-and-kids round so it's easy to forget it's basically a 6mm magnum.

 

[Double Dropper]

Its a carbine, 20 inch barrel unfortunately. Savage 110

 

[QuietTexan]

Ah ok, yeah maybe stick with the RL-17 so you aren't just making expensive smoke.

 

[slikmrc]

I've used the 90 grain accubond in couple of rifles, they worked very good on Mule deer out to 300 yards. Think I used H4895 and H4350, RL16 should give you good results.

 

[243winxb]

A 20" barrel and 10 twist may not put enough RPM's on the Nosler 90 gr Accubonds to get 1 moa?

 

[emp1953]

Nosler AB...thats not bad, anyone try the Swift Scirocco?

The Scirocco's shoot well in my short barrel Rem Model Seven. Better than either of the Nosler Accubonds. While the Accubond long range shoots worse than the regular old Accubonds. Just my experience with my rifle. They all have put deer down at 300+ yards.

 

[milboltnut]

I wouldn't count on the 243 having enough energy past 300 yards.