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			Just sold my 220. I would go with a faster twist, just in case you want to shoot a little heavier bullet, like a 60 or 69. The 1-12 will stabalize the 40s. The 1-7 in my 22-250 AI will stabalize down to a 55 gr so you could go up to a 1-9 twist and still get into the 40s and to the heavy 75s. 
Ed
		 
		
		
		
		
		
		
			
				__________________ 
				The three Rs: Respect for self; Respect for others; and responsibility for all your actions. 
 
"Is life so dear, or peace so sweet, as to be purchased at the price of chains and slavery? Forbid it, almighty God! I know not what course others may take, but as for me, give me liberty, or give me death!"
			 
		
		
		
		
		
	
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