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9.53 Saturn, 375-416 Rigby Imp anyone shooting them?

 
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Old 05-01-2012, 11:36 AM
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9.53 Saturn, 375-416 Rigby Imp anyone shooting them?

Looking into a new build - I want to try a .375 without getting into the Cheytac/505 Gibbs family of cases.

Is there anyone shooting a 9.53 Saturn, 375-416 Rigby Imp or 375 AX? Any info on these cartridges would be appreciated.....thanks
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Old 05-01-2012, 11:48 AM
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Re: 9.53 Saturn, 375-416 Rigby Imp anyone shooting them?

I'm working on one but haven't got all the parts yet. I ordered a Stiller TAC338 and a Krieger 10 twist .375 barrel. Mine will be a .375 based on a .338 Lapua Imp. with a 35* shoulder.
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Old 05-01-2012, 02:23 PM
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Re: 9.53 Saturn, 375-416 Rigby Imp anyone shooting them?

Quote:
Originally Posted by IdahoCTD View Post
I'm working on one but haven't got all the parts yet. I ordered a Stiller TAC338 and a Krieger 10 twist .375 barrel. Mine will be a .375 based on a .338 Lapua Imp. with a 35* shoulder.
So it'll be like the 338 Allen Xpress? What bullet are you planning on shooting?
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Old 05-01-2012, 04:01 PM
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Re: 9.53 Saturn, 375-416 Rigby Imp anyone shooting them?

Like the 375 Allen I guess. I don't know what Kirby uses for a shoulder angle or shoulder diameter. I talked to Dave Kiff at PTG and he recommended a 33-35*shoulder and a .562 shoulder diameter. So I'm going to go 35* and .562. He said the 33-35* shoulder angle has been proven to be more accurate when he tested them than the 40*. I'll do a .338 version later too as I have 2 Stiller actions coming.

I intend to try the CE copper bullets between 300 and 330gr and I have 260gr Accubonds I can try also. It depends on how much CE wants to do a custom order but I might have them make me brass bullets designed after the copper bullets. So high BC but lower weight and higher velocity.
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Old 05-05-2012, 12:24 PM
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Re: 9.53 Saturn, 375-416 Rigby Imp anyone shooting them?

What twist and barrel length are you looking at running?
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Old 05-05-2012, 12:31 PM
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Re: 9.53 Saturn, 375-416 Rigby Imp anyone shooting them?

I just got my barrel Thursday. It's Krieger 10" twist 1.350" shank for 5.5" straight taper to a 1.1" muzzle at 28". It should make the rifle just under 16lbs. It has to be under 16lbs to hunt with here.
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Old 05-05-2012, 08:17 PM
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Re: 9.53 Saturn, 375-416 Rigby Imp anyone shooting them?

What velocity do you think you'll get out of the 330?
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