Free Pass on Stupid "?" Thread - Page 12
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Old 08-08-2010, 06:21 AM   #111
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I've worn Redwings for about 7 years now, and won't work in anything else. Best damned boots available to the public.
Unfortunately even Red Wing has both boots made in China & USA. You'll know the US boots accause they cost too damn much money (I do have several pairs)
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Old 08-08-2010, 12:57 PM   #112
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OK how the hell do you say ogive?

IS it o give, o give (long I), og ive?

I know what it is I just never know how to say it.

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Old 08-08-2010, 01:09 PM   #113
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OK how the hell do you say ogive?

IS it o give, o give (long I), og ive?

I know what it is I just never know how to say it.
oh - jive (ō'jīv')

http://www.thefreedictionary.com/ogive << listen to the second example, first is brit.
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Old 08-08-2010, 01:41 PM   #114
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I know that one can shoot 44 special in a revolver chambered for 44 magnum, but can the same revolver also shoot 44 Russian?

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Old 08-08-2010, 02:53 PM   #115
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Thank you Cane and Dillinger. The MOA postings were very informative. I learned something.

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Old 08-08-2010, 04:13 PM   #116
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I know that one can shoot 44 special in a revolver chambered for 44 magnum, but I the same revolver also shoot 44 Russian?

It looks like you may be able to do it. I don't know the russian rim is .001" larger in Dia than the other two.





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Old 08-09-2010, 01:45 AM   #117
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All bullets have a natural center of axis, yes? In order to get the bullet spinning on that axis it is necessary to propel them in a controlled way, in the barrel, so that they don't wobble or go end over end.

A light bullet, spun too fast, can over rotate and come part. A heavier bullet not spun fast enough to generate rotation on it's own axis will result in the wobbling effect.

The ideal medium is to find at what twist rate, and for how long in the barrel, will it take for a bullet to achieve it's optimum rotational ability without spinning it apart.

I imagine there are physics and other factors involved, but essentially you are trying to achieve the optimal spin in the barrel that will keep the round spinning on it's own axis to achieve maximum accuracy.

This is where "Spin Drift" comes in. Some bullets that are spun correctly, like a .308 round at 500 yards, will have a negative effect from that same speed of rotation the longer it is in flight. At 1,000 yards or further a .308 round will experience Spin Drift where the round itself is generating enough motion to negatively affect it's accuracy.

Once again, it's all a balancing act. Spin it too fast, you lose accuracy, don't spin it enough, you lose accuracy, spin it correct at one distance and lose accuracy at a much further distance.

That is why long range shooting is one of the hardest things to do. There are so many variables that it's mind boggling.

Just a quick point on this significant variability; a member of my club only had to sprinkle a few extra flakes of powder when reloading her .223 cartridges to make a noticeable difference to eventual accuracy. Could hardly believe that something so seemingly incremental could have so much effect, downrange.
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Old 08-09-2010, 03:21 AM   #118
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Rate of twist 5.56/.223 in an AR platform?

Mine have a 1:9 twist, seldom shoot over 100 yards and never had issue with keyholing with heavier bullets. I've been told/read several times that for a heavier bullet I need a different twist. What's your thoughts?

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Old 08-09-2010, 03:50 AM   #119
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Special purpose rifles often have uncommon twist rates. For example, if you are building a varmint rifle and want to shoot the short 35 grain, 40 grain, and 50 grain bullets, a 1:12, or even 1:14 twist would be best. On the other hand, long range High Power shooters often select 1:8, 1:7.7, 1:7, or 1:6.5-twist barrels to stabilize the long 77, 80 and even 90 grain bullets used for 1,000 yard competition. Additionally, new testing of heavier rounds (68-77 grains) seems to show that they perform very well in simulated tissue and may be a better defensive choice than 55 grain or 62 grain rounds. The majority of shooters, though, typically shoot bullets of 50 to 69 grains in weight (note that the 62gr SS-109/M855 bullet is as long as a 71 grain lead core bullet) and should select 1:9 twist barrels. At typical .223 velocities, a 1:9 twist will stabilize bullet lengths equivalent to lead-core bullets of 40 to 73 grains in weight

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Old 08-09-2010, 05:14 AM   #120
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Hey Skull, here's a comparison of Mosin receivers for you:

Mosin Nagant Receivers and Miscellaneous Parts

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