heavy 223 bullet stability

M

MLC

New member
What twist rate is required to stabilize 75 grain 223 bullets?
I have a Model 1 Sales M4gery and was looking to shoot 75 grainers if at all possible, is the 1/9 twist enough? Should I go for 68's instead?
 
I will assume Hornady 75's are the question. Yes if the hollowpoint. No if these are the A-Max types as these are as long as Sierra 80's and require at least a 1:8 twist.
 
Black hills and hornady were my intention.
I also want to eventually build a DCM type rifle
should I go 1:8 or 1:7 for 80 grainers?
 
1:7 I have had no problems with lighter bullets in my 1:7 and even posted my best 100 yard group with 55 grain softpoints. With no wind, my 55 gr softpoints go into tiny 1/2-3/4 5-shot groups at 100.

If you reload for accuracy, the 64 grain PP by Win is a surprising target bullet especially for 100-200 yard reduced range with a 1:7. It stays under an inch even with my progressive load of ball powder.

The Black Hills/Hornady stuff will probably stabilize in warm weather with a 75. You are on the limit of stability and funky things can happen.
 
I used to think that bullets were sort of like Dicks "the Bigger the Better" so when i got a freefloated 1X9 flattop upper--the firstr thing i did was to order some 80 gr Sierras--well they didn't hit the paper sideways but the holes were not round and went everwhere.....i happened to have my old 1X7 a2 carbine with me that day and it would just about shoot them in the same hole....i later sold the 1X9 upper and got a 1X7 HBAR and it will shoot them sub moa.......Dick
 
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