20BR barrel length

I like the 55's. I have killed coyotes pd's, and steel with mine.
My McGowen shoots really good.
CzneqJel.jpg
 
I still need to confirm, but I believe I am using a Redding 6BR FL die with a bushing neck, and we did neck turn. Not sure what bushing I use, until I lay me eye on it.
BTW: Dan Ekstrom did the shooting on that itty-bitty group at 100 yards off of a Harris Bi-Pod and small field bag under the pistol grip.
E
 
My 20BRAI is a no turn necking down Lapua 6BR brass. My loaded rounds are .2325 and my chamber neck is .236
 
25.6" drop at 500 is pretty good, with a 200 yard zero.
29.1 with a 100 and sea level

I just noticed you have a 200 yard zero.
I should have noted, that my XP-100 has a 100 yard zero.
With a 200 yard zero (4500 feet of elevation & 70 degrees) my 15" 20BR with the 55 Berger has 30.3 inches of drop at 500 yards.
 
I just noticed you have a 200 yard zero.
I should have noted, that my XP-100 has a 100 yard zero.
With a 200 yard zero (4500 feet of elevation & 70 degrees) my 15" 20BR with the 55 Berger has 30.3 inches of drop at 500 yards.
What calculator are you using because when I put your info in the Berger calculator it shows 35" drop with 200 yard zero at 500 yards 70 deg 4500' elevation at 3173fps.
When I just change my velocity 3750fps
It comes out to 23.4" drop at 500
 
My Holland data, puts drop at 7.5 MOA at 500 yards, 4500 elev, and 70 degrees with a 100 yard zero, while Shooter has me at 6.8 MOA.
I must have some data wrong somewhere in Shooter
 

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