berger 200 hybrids in 308

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coyote06

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trying to tune berger 200 hybrids in 308

Trying to tune the berger 200 hybrids in 308 win and are finicky , barrel is a 30" Xtra Heavy Palma 4 groove 10 twist chambered with the US team reamer from PTG it has .170" freebore.

running them at about 2580 grouping at 300M about 1 inch or less only to open up to 2 minutes at 600M getting weird results I'm thinking this bullet might like a different speed maybe slower?
 
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coyote06 said:
Trying to tune the berger 200 hybrids in 308 win and are finicky , barrel is a 30" Xtra Heavy Palma 4 groove 10 twist chambered with the US team reamer from PTG it has .170" freebore.

running them at about 2580 grouping at 300M about 1 inch or less only to open up to 2 minutes at 600M getting weird results I'm thinking this bullet might like a different speed maybe slower?
Click to expand...


I am using them in my 30" Bartlein 1 in 10 twist F/TR barrel. free bore is approx. .180". in Palma brass. 44.3 gr of Varget is shooting excellent from 600 to 1000 yds. velocity around 2675 fps.

a buddy shoots a Bartlein 1 in 10 with the same free bore as yours. he uses 43.3 gr of Varget in standard Lapua brass. getting good accuracy at approx. 2630 fps
 
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I noted your speed of 2580 the accuracy node is 2600+ more specifically between 2600 - 2665fps, depending on barrel freebore 4 grove vs 5r an so on...most folks i have talked to say they can tune them to shoot flat.

all the best
Trevor
 
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