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New to 243 and reloading

operatorj

Sergeant
Full Member
Minuteman
May 17, 2009
626
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Heltonville ,Indiana
Im pretty new to reloading and the 243 so i need alittle help finding a good start point for a load. I have a 1-9.125 twist 20" barrel and am looking for a good load for out to 700 yrds. Been looking at the 105news a-max and the 107 sierra matchkings. Will they stabilize with that twist or should i look at something like a 80-100 grain round. Also would 4350 be a good powder to start or should i go with some thing else.
 
Re: New to 243you and reloading

The 107 SMK's will need a 1 in 7.7 to 1 in 8 twist to stabilize them. the 95 Gr SMK even needs a 1 in 9 because it is so long. With a 20 inch barrel, you are going to want a medium burning powder to get up to speed, and 4350 should get the job done. I think you will have an easier time with the A-max bullets, but your barrel is probably suited more for the 85-87 grain bullets.
 
Re: New to 243 and reloading

Rmitch223- thats some good info. I may try that.
I also just ordered some 95gr bergers to give them a try. Now i just need to figure out the powder and primers. My local shop has 4350a and winchester primers so i may try that route.
 
My win70 22 8nch barrel has max load of 45gr with 100gr Speer bullet moa no problem feels a little hot looking at primers, velocity is 2950 on a -10c day will be 3000 easy on a warm day.but I feel maybe , should back off a little maybe 44.7 will do
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