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Will it work ? (Read 8604 times)

Hi-Wall56 Full Member Offline Posts: 204 Location: Banks of the Brazos River Joined: Feb 11^th, 2011	Will it work ? Apr 19^th, 2017 at 10:39pm	Print Post
	Can I stabilize a 285 grain bullet that measures 1.148" in a 1:12 twist barrel ? If there is a website that has this info, please let me know. thanks, Hi-wall56


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John Boy Ex Member	Re: Will it work ? Reply #1 - Apr 19^th, 2017 at 10:45pm	Print Post
	(You need to *Login* or *Register* to view media files and links) Need the caliber and velocity for input
	« Last Edit: Apr 19^th, 2017 at 10:56pm by »

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Hi-Wall56 Full Member Offline Posts: 204 Location: Banks of the Brazos River Joined: Feb 11^th, 2011	Re: Will it work ? Reply #2 - Apr 19^th, 2017 at 10:51pm	Print Post
	John Boy, it wont let me input .375 as bullet diameter???


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Hi-Wall56 Full Member Offline Posts: 204 Location: Banks of the Brazos River Joined: Feb 11^th, 2011	Re: Will it work ? Reply #3 - Apr 19^th, 2017 at 10:55pm	Print Post
	Jeez, I've got to move that bullet at 3000 fps to stabilize? That's not gonna happen.


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John Boy Ex Member	Re: Will it work ? Reply #4 - Apr 19^th, 2017 at 11:02pm	Print Post
	The velocity is a variable input! Stability Input Data Caliber: 0.375 in Bullet Weight: 285.0 gr Bullet Length: 1.148 in Plastic Tip Length: 0.000 in Muzzle Velocity: 1200.0 ft/s Barrel Twist: 12.0 in Temperature: 59.0 °F Pressure: 29.92 in Hg Output Data Stability: 3.760 Stability Input Data Caliber: 0.375 in Bullet Weight: 285.0 gr Bullet Length: 1.148 in Plastic Tip Length: 0.000 in Muzzle Velocity: 1400.0 ft/s Barrel Twist: 12.0 in Temperature: 59.0 °F Pressure: 29.92 in Hg Output Data Stability: 3.958


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John Boy Ex Member	Re: Will it work ? Reply #5 - Apr 19^th, 2017 at 11:11pm	Print Post
	Might want to use 17.0 to 7.2 gr of Alliant 300 MP to put you in the 1400fps velocity range. Of course other powder charges are options also You can play with this calculator for powder charge ... (You need to *Login* or *Register* to view media files and links)


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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Will it work ? Reply #6 - Apr 19^th, 2017 at 11:23pm	Print Post
	Be careful of the programs or those trying to sell moulds based on a program that simply says such a such bullet bullet will stabalize in such a such twist barrel. They / them who are trying to group buy them need to realize they have no bearing at all on what type of accuracy they might be able to achieve. My own latest testing goes well beyond stability, seating depth and powder charge. It is geared to making a bullet that is custom fit to fit my needs based on length plus a multitude of other aspects that follow suit based soley finding its most efficient flight characteristics from muzzle to target. It is becoming very interesting by how much a small change in length really makes but I still have a long ways to go before I can honestly share any of my own personal findings. JLouis

	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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John Boy Ex Member	Re: Will it work ? Reply #7 - Apr 19^th, 2017 at 11:25pm	Print Post
	And if your powder charge will be black powder ... 42 to 45gr of FFg will put you in the area of 1200 fps Got a handle now on what you have to do?


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SSShooter Frequent Elocutionist Offline Posts: 2944 Location: Southern NJ Joined: Aug 1^st, 2010	Re: Will it work ? Reply #8 - Apr 20^th, 2017 at 7:05am	Print Post
	The 1.46" long, 360gr BACo Money bullet shoots just fine in my 13" twist 38-50 barrel. Load is 54gr of 2F Swiss (my rifles are originals and I won't sully them with smokeless ). Your 12" twist should be even better. The lightest bullet I shoot is the BACo 325gr bullet, but am on the list for the 1.22"/308gr group buy, should we ever get the needed 10 molds. The best 38cal (38-50) shooter in the nation is from CO. He is generally in the top 5 at Raton and shoots a 370gr bullet in his 12" twist, 30" long barrel. He also shoots the same bullet in a 32" long 12" twist barrel for BPTR.
	« Last Edit: Apr 20^th, 2017 at 7:29am by SSShooter »
	Glenn - Stevens 044 1/2, Bartlein SS 5R barrel in 22LR
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John Boy Ex Member	Re: Will it work ? Reply #9 - Apr 20^th, 2017 at 10:01am	Print Post
	Hi-Wall - you never mentioned the groove diameter of the rifle you plan to shoot the 38-55 unknown 285gr bullet you plan to shoot. What mold is this 285gr bullet from also?


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Hi-Wall56 Full Member Offline Posts: 204 Location: Banks of the Brazos River Joined: Feb 11^th, 2011	Re: Will it work ? Reply #10 - Apr 20^th, 2017 at 10:06am	Print Post
	John Boy, I will be shooting black powder so I'll start with your load and see how it does. Thanks for the link, I'll give it a look. SSShooter, Thanks for the suggested bullets and load. Folks on this site are a wealth of information and I appreciate the help. Hi-Wall56


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gunlaker Frequent Elocutionist Offline Posts: 2626 Location: lower mainland, B.C. Joined: Dec 13^th, 2010	Re: Will it work ? Reply #11 - Apr 20^th, 2017 at 10:10am	Print Post
	I doubt very much that you'll have a problem unless that bullet is very blunt ( i.e. large meplat ). Glenn has been shooting the .38's with black powder and what he's doing seems to work. I was advised by a couple of experienced .38 BPCR shooters to keep bullet length to a max of 1.28" for my 1:14 twist rifle. I only shoot .40's and .45's in BPCR/BPTR competition, but at schuetzen distances my 1.28" .38 cal bullets in 1:14 twist powered by Fg black powder are far more stable than my .32-40's. I've never had even a hint of tipping in the coldest weather. Chris.


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frnkeore Frequent Elocutionist Online Posts: 7675 Location: Central Point, OR 97502 Joined: Jun 16^th, 2010	Re: Will it work ? Reply #12 - Apr 20^th, 2017 at 11:43am	Print Post
	JLouis wrote on Apr 19^th, 2017 at 11:23pm: Be careful of the programs or those trying to sell moulds based on a program that simply says such a such bullet bullet will stabalize in such a such twist barrel. They / them who are trying to group buy them need to realize they have no bearing at all on what type of accuracy they might be able to achieve. My own latest testing goes well beyond stability, seating depth and powder charge. It is geared to making a bullet that is custom fit to fit my needs based on length plus a multitude of other aspects that follow suit based soley finding its most efficient flight characteristics from muzzle to target. It is becoming very interesting by how much a small change in length really makes but I still have a long ways to go before I can honestly share any of my own personal findings. JLouis John, John, John, (or should I say Smiley) you should at least give me credit for the group buys Stabilization and accuracy, are two different things. A bullet is stabile if it goes through the target point on. Accuracy has to be found by combining everything together and no other way! I could add more about your current accuracy but, I won't in the same manner that you didn't give me credit I've underlined, in red, the most important sentence in your post! Frank

	ASSRA Member #696, ISSA Member #339
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JLouis Frequent Elocutionist Offline Posts: 10625 Joined: Apr 8^th, 2009	Re: Will it work ? Reply #13 - Apr 20^th, 2017 at 4:56pm	Print Post
	I don't want the others here to miss the point a bullet starting at 1.008 in length and going up to 1.90 in length in .010 increments will all easily stabilize according to Miller's rule so it gives one ten choices to choose from. This was done using my .285 bullet and lead and tin alloy. The 1.090 / 160.2gr. bullet will not stabilize I have tried it even though the program says it should easily do so. So the point of my current testing is which of the ten choices will provide the least amount of time of flight it being equal to the most effeciant bullet length choice for my particular rifle and possibly others as well it being my ultimate goal. I could have very easily increased that choice from ten to twenty but I think those here will get the point trying to be made. As one can easily see a program can not provide that information for you so how does one really come up with the right choice to make without getting out to try them all in the real world. I don't have the means to record time of flight and proposed program BC's have proven to be false in the past. So the only thing I have to go by is an increase or decrease in accuracy and I can honestly say ten thousandths of an inch in bullet length is showing a noticable differance in consistant accuracy for me. JLouis
	« Last Edit: Apr 20^th, 2017 at 6:09pm by JLouis »
	" It Is Better To Now Have Been A Has Been Than A Never Was Or A Wanna Be "
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calledflyer Frequent Elocutionist Offline Posts: 3995 Joined: Mar 9^th, 2015	Re: Will it work ? Reply #14 - Apr 20^th, 2017 at 6:33pm	Print Post
	So, beside trying to try a bunch of bullets to see what's best in your rifle will the result you end up with show that, for instance chopping off ten thou after gaining stability, that a bullet will become more accurate. If not something similar is your point, right? Not another argument just trying to figure out what you're trying to show us. I know that for a century and a half we've understood the principal that even a variety of stable bullets will show marked differences in accuracy. From what I've read you just seem to be trying a bunch of similar bullets. Help


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