COR
.375 Atomic
Posts: 1,522
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Post by COR on Jun 1, 2012 19:29:35 GMT -5
I have meant to ask Lee, Whitworth and/or ?? how do the 475 and 500 Linebaugh's (or equiv's) do with the "standard" 400 or 450 or so gr loads launched at 1000 - 1100 fps in the same tests. Short of the few, if any, that will chase buffalo like Mr. Seyfried and instead may carry the extreme to elk, moose, perhaps grizzly/brown bear it would seem that what I have suggested would be plenty? Your view? Don't ask him...he thrives on 500's at 1350... ;D I'm with you on the 400's at 1100. That'll leave enough of a mark to satisfy my wapiti, someday a moose...brown bear get a rifle.
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Post by waterboy on Jun 1, 2012 20:34:19 GMT -5
Finally got my connection sorted and the pictures loaded! What a fun time. I'd love to attend, alas was too tied up. I'm not used to working that hard either, it's rough on me. Good fellowship and shooting, God is good! Mas photos!
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Post by Lee Martin on Jun 1, 2012 23:05:03 GMT -5
Haven't penetrate tested 400's at that speed, but I gotta think they'll come close to the heavy stuff. Seems like any well designed nose profile, big caliber bullet going 1,100 fps or more bores a hole. Hell, 335 45 Colts at 1,300+ fps went 28". Full throttle 440 gr 500 Linebaughs add another 12" or so and they're 100 fps slower. Whit and I will be testing more later this year with our 500 Maxs. I'll run a few 525 WFNs and 440 WFNs at 1,000 - 1,100 and see what happens. I will say this.....caliber combined with weight and a good nose profile makes velocity less and less critical. -Lee www.singleactions.com"Building carpal tunnel one round at a time"
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Post by boxhead on Jun 2, 2012 3:18:06 GMT -5
Those are my thoughts as well and why I generally load my larger bores to 1100 fps or so. Would be interested to see the test.
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Post by kaytod on Jun 2, 2012 9:09:38 GMT -5
Penetration results
475 Linebaugh 375 grain Cast performance @ 1700 fps = 40.5" plain paper 375 grain Cast performance @ 1200 fps = 42" plain paper
45 colt 400 grain @ 1120 fps = 48" plain paper 355 Keith @ 1210 fps = 48" plain paper 315 Keith @ 1120 fps = 38" plain paper
38-40 WCF 230 grain Corder CW @ 1450 fps = 43" plain paper
458 winchester 500 grain Hornady DG solid @ 1900 fps = 60" plain paper
45-70 420 grain WFN @ 1670 fps = 34" plain paper
44 special 250 Keith @ 1275 fps = 36" plain paper
41 mag 217 grain LBTLFN @ 850 fps = 26" plain paper
500 Maximum 475 grain LFN @ 1450 fps = 54" plain paper / 4" paper, bone, + 8 inches
5.45x39 52g @ 2952 fps = 16.5" plain paper
20 Gauge Dixie Terminator 500 grain @ 1450 fps = 29" plain paper
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Post by tek4260 on Jun 2, 2012 9:45:08 GMT -5
400gr 45 colt at 1120!! WOW!
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Post by maxcactus on Jun 2, 2012 11:28:46 GMT -5
Penetration results 45 colt 315 Keith @ 1120 fps = 38" plain paper 44 special 250 Keith @ 1275 fps = 36" plain paper I don't know if the results above are statistically significant or not, but the comparison is interesting given the near-identical penetration but the significant difference in weight.
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Post by kaytod on Jun 2, 2012 17:39:46 GMT -5
I didn't see the tests on the 5.45 45-70 41 44 spl
but I did the rest. The 458 went fairly straight. Not stringline as it did "wander" a bit and was tipped the last few inches.
The others were all straight line penetration.
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Post by dlhredfoxx on Jun 2, 2012 18:41:48 GMT -5
475 Linebaugh 375 grain Cast performance @ 1700 fps = 40.5" plain paper 375 grain Cast performance @ 1200 fps = 42" plain paper
... can somebody explain this one to me? Seems counter intuitive but I'm sure someone has a logical explanation... 500 fps slower, 1.5" LESS penetration?
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Post by kaytod on Jun 2, 2012 19:56:10 GMT -5
Generally speaking, which there are many variables, but we will start with solids albiet lead or copper. We have to have enough velocity to overcome the resistance of the material being penetrated. However there comes a point, depending on the bullet design and alloy, that increased velocity inhibits penetration as the material being shot becomes more "solid".
The material cannot be displaced fast enough and robs the bullet of its forward momentum hence reducing its penetration.
Slower bullets don't necessarily make as big of temproary cavity as they do when driven to higher speeds, but they penetrate deeper and may result in more total wound area. ( I've never figured it up )
When speaking of lead bullets, there comes a point when you will overcome the strength of the alloy and damage the bullet upon impact, blowing the nose off and damaging the meplat. When you do, mass is reduced and penetration is severly impacted.
To put this in simple terms. If you've ever done the belly-flop onto the pool from the side, it stings. If you do it from the low-dive, it stings more. From the High-dive it hurts like old Ned. IF you do a cliff dive and belly flop, you die. The water is now too "hard"
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dmize
.401 Bobcat
Posts: 2,825
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Post by dmize on Jun 2, 2012 20:53:33 GMT -5
That kinda goes along the lines of how a 55gr VMax out of my 22-250 will blow a groundhog to ribbons but will make a perfect hole thru a piece of 1/4 in sheet steel,my beloved 45/70 will put a 405 cast bullet thru 4 Missouri whitetails but will only dent the same piece of steel.
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Post by Lee Martin on Jun 4, 2012 13:20:24 GMT -5
I should clarify. My reference to our 335 grain 45 Colt going 28" was in heavily soaked newspaper. Todd - I assume the Linebaugh tests used similar wet medium? The penetration results you cited were way higher than what we've experienced in our trials. I ask because you noted "plain paper" but never mentioned it being water soaked. -Lee www.singleactions.com"Building carpal tunnel one round at a time"
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Post by whitworth on Jun 4, 2012 13:43:14 GMT -5
It would stand to reason that it is water soaked. This has been JL's standard procedure since Ross Seyfried turned him on to wet newsprint many years ago.
Todd?
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Post by kaytod on Jun 4, 2012 16:38:46 GMT -5
Yes it is soaked paper. It is soaked at least 4 hours if the newspaper has no "slick" color inserts. Those will take another two to saturate.
When we build the "animal' on the board. We only "squeze" out enough water to make the papers stand upright. The balance of the water will drain naturally leaving only the saturated paper, but is uncompressed. ( uh not like having Tim push the paper together....)
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Post by kaytod on Jun 5, 2012 16:35:00 GMT -5
Normally the .44 250K at 1250 will run right at 29" penetration average. If they guys let the stuff be loosely stacked, or some of the mushy paper for the prior day, It will give more.
I try to tell folks that we are looking for the average penetration over X number of shots. As you will occasionally get one that goes far less/more which is the nature of things, ( animals are truly different each time...)
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