I have used the Sciroccos quite a bit in the 243. They can be a little fussy, but we did get proven performance out to 390 yards. You can probably get that bullet to perform to 500.
243 Winchester 1:10 twist long range load
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25WSM
Well-Known Member
Use RL 26 and get 3200 to 3300 fps from those 100 grain bullets. Will make up for a little of your lost bc over the 105 class bullets. Punch that baby out to an ai and get another 150 fps.
Shep
Shep
Polaris_Doc
Well-Known Member
So I have a rem 700 I picked up for a decent price that was rebarreled with Mountain Rifle Co. barrel with standard 243 1:10 saami spec. Med weight barrel, magpul stock, 2.5# trigger, vortex viper pst 4-16x50. Thought it was gonna be a great hunting gun, as I've only heard great things about the .243. Well, about 300 rounds into load development, I was giving it another 100 rounds before it went down the road it was so bad. Tried 6 different powders. Nosler 95s, 105 a-max, 95 sst, and 90 eld-x. Was getting desperate! Some groups were ok, especially for a mid range hunting gun, but most groups looked like a shotgun pattern. Finally did some more research and thought I'd try the Berger 95 classic hunters. And as mentioned above, the Berger stability calculator does show as not stable and box does mention 1:9 recommended. Well, almost all groups with a few different powders were better than anything else. Ended up with 42.0 gr of H4350, seated at 2.25" bto (.015 jump), hornady brass, 210, annealed with .002 neck tension, 3030 fps avg. Shoots consistently if I do my part.
Took this to my first PRS match and placed 12/24. Think I'm gonna keep it. See attached pic, 5-shot 200 yd group.
Took this to my first PRS match and placed 12/24. Think I'm gonna keep it. See attached pic, 5-shot 200 yd group.
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Double Dropper
Well-Known Member
I am not punching it out to an AI, I am not doing a new barrel, 1:8 twist. Not happening but good suggestions. Just hoping to extend this to a 400 yard killer.
Double Dropper
Well-Known Member
Starting point for RL-26???
I've found the Scirocco performs better than the Nosler AB, but only slightly. And the fact that for quite a while the Swift's were hard to find I settled on the Noslers only because they were more readily available.
Bobby-Long
Active Member
I shoot 90 grain accubonds for deer in a 243. I also shoot the Sierra 85gr HPBT Game King. If the Sierras don't shoot well, there is another problem. Bother are great deer bullets.
My Remington seems to like factory Federal 75 grain better than anything else, (at least so far).
I've been trying to make this work in my Rem700 Varmint 1 in 10" 243 for several years now. I shoot at about 4800 feet altitude out beyond 1000 yards. 100s, 95s work OK out to about 800 yards, but fall apart (tumble) beyond that. I use 2x4s to support steel targets and often find the 243s keyholed in the 2x4s past 800.
If you are intent on using your 1/10 243 for long range, try a good bullet in the 85 - 90 gr. range, don't worry about BC, and keep it as fast as is possible with accuracy.
Myself, I've given up and decided to rebarrel the 243 in a 1/7.5 remage and use something like the Berger 109s for long distance (if they ever become available again).
If you are intent on using your 1/10 243 for long range, try a good bullet in the 85 - 90 gr. range, don't worry about BC, and keep it as fast as is possible with accuracy.
Myself, I've given up and decided to rebarrel the 243 in a 1/7.5 remage and use something like the Berger 109s for long distance (if they ever become available again).
Double Dropper
Well-Known Member
It is slim pickin's out there for sure. I was at two Cabelas and two gun stores in the last 24 hours the only 6mm bullets they had were over 100 grains. And two boxes of 80 grain Barnes TTSX, not sure about these though.
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ALOT of guys swear by the Sierra 85 gr HPBT Game King.
