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22 Creedmoor and 85.5 Berger

waspocrew said:
My experience (and many others with a 22 CM or 22-250 AI) has been different using a 1:8 twist. I can push them comfortably to 3200+ and they've shot very well out to distance. I've shot a coyote at 600 yards, doe antelope at 420 yards, and mule deer buck at 320 yards with the 88 ELDM.

Plugging numbers into berger's stability calculator shows "marginal stability" with 6% BC compromise at 5000' elevation - on target performance has shown it hasn't been anything to worry about at this point.
Click to expand...
Berger's stability calculator does not factor in plastic tips. It's not useful for stability of anything with a tip.
 
waspocrew said:
My experience (and many others with a 22 CM or 22-250 AI) has been different using a 1:8 twist. I can push them comfortably to 3200+ and they've shot very well out to distance. I've shot a coyote at 600 yards, doe antelope at 420 yards, and mule deer buck at 320 yards with the 88 ELDM.

Plugging numbers into berger's stability calculator shows "marginal stability" with 6% BC compromise at 5000' elevation - on target performance has shown it hasn't been anything to worry about at this point.
Click to expand...

I'm running a Bartlein 7.5" twist. I assumed that the 88ELD bullets would be too long/heavy for my rifle. Maybe I'll give them a try. The 85.5 Bergers shoot very well.
 
stazmania said:
I have seen the bullet length chart before and it shows the length of the bullet with out the tip and the tip length separately. If it is included in the stability calculation why do they show it separately?
Click to expand...
If you have the length without the tip you could discount it in the stability calc. The tip is included because a plastic tip does not weigh what lead(or other metal) does. The plastic tip assumptions don't work as well if you have an aluminum tip. Weight matters.
 
akmtnhnt said:
If you have the length without the tip you could discount it in the stability calc. The tip is included because a plastic tip does not weigh what lead(or other metal) does. The plastic tip assumptions don't work as well if you have an aluminum tip. Weight matters.
Click to expand...
The bullet length chart separates Aluminum tip measurements the same as plastic. My question is do you add the two measurements together or just use the non tipped measurement when calculating stability?
 
I had zero problem running 88's in a 8" twist 22-284 a couple of years back running Nosler CC.
I have since moved to a 22-250AI 7" twist, running a few 88g pills, but not Hornady.
7.5" twist should handle all 88g pills.

Cheers.
 
waspocrew said:
My experience (and many others with a 22 CM or 22-250 AI) has been different using a 1:8 twist. I can push them comfortably to 3200+ and they've shot very well out to distance. I've shot a coyote at 600 yards, doe antelope at 420 yards, and mule deer buck at 320 yards with the 88 ELDM.

Plugging numbers into berger's stability calculator shows "marginal stability" with 6% BC compromise at 5000' elevation - on target performance has shown it hasn't been anything to worry about at this point.
Click to expand...
Very interesting
 
stazmania said:
The bullet length chart separates Aluminum tip measurements the same as plastic. My question is do you add the two measurements together or just use the non tipped measurement when calculating stability?
Click to expand...
Use the total length of the bullet with the tip, and then enter the tip length in that part of the calculator.
 

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