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Re: 38-55 & Serious Bench Rest Accuracy (Read 16764 times)

westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11451 Location: Why, out West of course Joined: May 29^th, 2006	Re: 38-55 & Serious Bench Rest Accuracy Reply #15 - Dec 5^th, 2010 at 5:03pm	Print Post
	Caliber .377 Bullet Weight 324.5 Bullet Length 1.3 Inches Barrel Twist 14 Inches/turn muzzle velocity 1350 Temperature 55 degrees Fahrenheit (59 is standard) Pressure 29.92 inches of mercury (29.92 is standard) Joe.

	A blind squirrel runs into a tree every once in a while.
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11451 Location: Why, out West of course Joined: May 29^th, 2006	Re: 38-55 & Serious Bench Rest Accuracy Reply #16 - Dec 5^th, 2010 at 7:06pm	Print Post
	Okay, obviously I will not be changing twists. Am I correct to assume I must use a longer bullet to fall within the SG range? Can I reduce velocity to fall within the SG range? Joe.

	A blind squirrel runs into a tree every once in a while.
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11451 Location: Why, out West of course Joined: May 29^th, 2006	Re: 38-55 & Serious Bench Rest Accuracy Reply #17 - Dec 5^th, 2010 at 8:33pm	Print Post
	Okay, my assumption is correct. Here's the calculator I use/play with. (You need to *Login* or *Register* to view media files and links) I have used it to get close to SG length for my picket molds. If you use my numbers but change the 1350 velocity to 1300. It gives a twist of 14. Dont know why our two sources dont agree. When using my calculator I find I can use longer bullets than it recommends. So I use it for a base line only. It's fun to play with but in actual use it has little value for me. Wished I had exell. It would be fun to figure out why they dont jive. Joe.

	A blind squirrel runs into a tree every once in a while.
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11451 Location: Why, out West of course Joined: May 29^th, 2006	Re: 38-55 & Serious Bench Rest Accuracy Reply #18 - Dec 5^th, 2010 at 10:54pm	Print Post
	I know that John. Never thought you were. Confusion is not a bad thing. Wished I had exell. Joe.

	A blind squirrel runs into a tree every once in a while.
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mes Senior Forum Member Offline Posts: 491 Location: Van Dyne, Wisconsin Joined: Apr 17^th, 2004	Re: 38-55 & Serious Bench Rest Accuracy Reply #19 - Dec 6^th, 2010 at 5:27pm	Print Post
	Quote: Wished I had exell. Joe. Joe: Go to the following url and you can download from Micro Soft a free Excell reader/viewer (You need to *Login* or *Register* to view media files and links)

	Martin Stenback
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11451 Location: Why, out West of course Joined: May 29^th, 2006	Re: 38-55 & Serious Bench Rest Accuracy Reply #20 - Dec 6^th, 2010 at 9:13pm	Print Post
	Mes, that free down load is a excell viewer program. Wont let me use the formula. Nothing is free guys! Joe.

	A blind squirrel runs into a tree every once in a while.
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4060may Full Member Offline Posts: 173 Location: Richfield Joined: Jul 12^th, 2006	Re: 38-55 & Serious Bench Rest Accuracy Reply #21 - Dec 8^th, 2010 at 2:33pm	Print Post
	got to (You need to *Login* or *Register* to view media files and links) download the program compatible with MS Excel FREE


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Stonewall Ex Member	Re: 38-55 & Serious Bench Rest Accuracy Reply #22 - Dec 10^th, 2010 at 12:34pm	Print Post
	A few interesting links: (You need to *Login* or *Register* to view media files and links) (You need to *Login* or *Register* to view media files and links) Bryan Litz home page (You need to *Login* or *Register* to view media files and links) You can email Bryan with questions. He will answer promptly. He writes extremely well eplaining complex ballistics in a manner that everyone can understand. And just not in theory as there is firing data for a lot of common long range bullets . Glenn


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MartiniBelgian Frequent Elocutionist Offline Posts: 1674 Location: Aarschot Joined: Jun 7^th, 2004	Re: 38-55 & Serious Bench Rest Accuracy Reply #23 - Dec 10^th, 2010 at 2:01pm	Print Post
	Joe, download the openoffice as 4060 suggested - it has a complete excel-like spreadsheet and best of all - it is completely free! It has just about everything MsOffice has, without having to pay for it...


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frnkeore Frequent Elocutionist Offline Posts: 7261 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: 38-55 & Serious Bench Rest Accuracy Reply #24 - Dec 11^th, 2010 at 9:34pm	Print Post
	John, Have you ever used pistol primers with the 300MP powder when you were doing your 32/40 tests? Frank

	ASSRA Member #696, ISSA Member #339
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westerner Frequent Elocutionist Offline deleted posts and threads record holder. Posts: 11451 Location: Why, out West of course Joined: May 29^th, 2006	Re: 38-55 & Serious Bench Rest Accuracy Reply #25 - Dec 11^th, 2010 at 10:01pm	Print Post
	You got me beat John. I cant equal those targets with my most accurate rifles. Joe.

	A blind squirrel runs into a tree every once in a while.
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SSShooter Frequent Elocutionist Offline Posts: 2917 Location: Southern NJ Joined: Aug 1^st, 2010	Re: 38-55 & Serious Bench Rest Accuracy Reply #26 - Feb 4^th, 2011 at 10:04pm	Print Post
	I'm learning. Thank you.

	Glenn - 2x CPA 44 1/2 w/22LR (Shilen ratchet-rifled & Bartlein 5R rifled), 38-40RH & 38-55WCF (Bartlein 5R rifled) & 40-65WCF (GrnMtn 'X') barrels
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