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Post by MarkKw on Feb 4, 2005 18:44:37 GMT -5
What ever happend to the 150 gr 6mm round nose bullets? Can't find 'em anywhere.
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Post by TKO on Feb 4, 2005 19:22:19 GMT -5
That 150 is a typo, right?
The heaviest I can think of is 115 grain in 6mm.
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Post by MarkKw on Feb 5, 2005 5:43:52 GMT -5
No, not a typo. Actually the correct bullet I'm looking for is a 167 grain. I started a project many years ago and got to thinking about it again yesterday. I know at least one company made 150 gr RN in .243" but I don't recall who. Mil surplus of these has gone with the wind as well. I'll have to keep searching the "for sale" ads.
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Post by TKO on Feb 5, 2005 10:33:08 GMT -5
Well now my interest is up. I will help you look.  |
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Post by MarkKw on Feb 5, 2005 18:47:08 GMT -5
Worse comes to worse. I can get Cu mechanical tubing and have the machine shop bore me a core mold. Really didn't want to get into casting cores and swaging my own but it may come down to it. If that's the case, I'm going with a semi-pointed RN in 190gr.
Don't want to let the cat out of the bag just yet but I can tell you that this project involves a big case and lots of slow buring powder.
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Post by Kudzu on Feb 5, 2005 21:33:35 GMT -5
Sounds like another ultra mag in the making
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Post by MarkKw on Feb 6, 2005 5:10:15 GMT -5
Actually, a resurrection of very old idea with a few new twists and modifications added. All I can say is it's quite interesting what you find when you study history. It's also amazing how much history is ignored in this new SSM world.
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Post by TKO on Feb 6, 2005 14:57:54 GMT -5
190 grain 6mm . . . sectional density/penetration will be through the roof. Better have a real s-l-o-w twist for that puppy. |
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Post by MarkKw on Feb 6, 2005 17:44:00 GMT -5
Since the formula's for twist only work so-so, I have to do a lot more checking on what other people got with this bore size & bullet weight. Been so long since I considered doing anything with this that I don't recall what the pref. twist was for a similar bullet but I want to say it was not all that fast. Nice thing about studying the past, saves a lot of R&D work most of the time learning from others boo boo's.
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Post by Rifleman on Feb 6, 2005 19:36:51 GMT -5
Slow twist? I would think just the opposite, I mean longer bullets in .223 require a faster twist,why would this be any different? Not arguing, just wanna know.
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Post by TKO on Feb 6, 2005 21:33:11 GMT -5
The s-l-o-w thing was an attempt at sarcasm. The 190 6mm would require an EXTREMELY fast rate of twist. ;D |
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Post by MarkKw on Feb 7, 2005 5:28:56 GMT -5
If I'm not mistaken, haven't had time to check yet... once you get over a certain length on a projectile, the rate of twist starts slowing down again.
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Post by ourway7 on May 9, 2005 3:20:12 GMT -5
I have been shooting a 6m/m for atleast 30-40 years and this is a new one on me, shows never too old to learn. I have always had very good accuracy with 4350 and 100 gr. sierra spitzers. Great for deer. Recently gave my rifle to my son, told him I hope he has the same luck I've had with it over the years with it. Lou
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