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375/408 Banded Solids Test

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  #64  
Unread 02-11-2010, 08:52 PM
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Re: 375/408 Banded Solids Test

I havent had any experience with the bullets you mentioned except the Rocky Mtns. They were fired out of an 8 twist and SPLODED. Others here should be able to answer your question better than I.
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  #65  
Unread 02-11-2010, 11:04 PM
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Re: 375/408 Banded Solids Test

I tested the first generation of the 370gn Rockymtns and they came apart in my gain twist. Geo said that the jackets were to thin so he increased the thickness. I have a box of the new ones to test, with the thicker jackets they now weigh 359 gns. This weekend i will be running these through the barrel (weather permitting)

Dave
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  #66  
Unread 02-12-2010, 01:17 AM
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Re: 375/408 Banded Solids Test

Dave, please let us know the results of your test...For now, this seems like a bullet that I can use.....thanks
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  #67  
Unread 02-12-2010, 09:32 AM
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Re: 375/408 Banded Solids Test

Quote:
Originally Posted by Augustus View Post
KZ, I have fired several of the bullets mentioned in this thread, I have done almost all of the testing on the various ZA 375, I have also shot the SMK and the Rocky MTN bullets. Here is what I have found:
An 8 twist will explode the Rocky Mtn hollow point and alum. tip
The SMK shot OK in the 8 twist, nothing spectacular
The 6 cal ZA works nice in the 8 twist
The 6.5 ZA is going to need at least a 6.5 twist
The 7 cal will most likely need a 5.5 twist to stabilize at 2900
The gain twist barrels should have entrance and exit twist with less deviation
than my 13-6.5
A 375 Chey w/o a break is not fun to shoot.
Augustus,,,,You mentioned here the 8 twist will explode the rocky mtn in 375 cal.....Please clairify for me....is that a 1 in 8 twist only....or is that the gain twist also 16--8 that will explode the rky mtn bullets?????

If I can get 1/2 moa in accuracy with the 350 smk with the 16--8 twist, and it wont explode the rky mtns, ths may be the configuration I need. I can have good accuracy with the smk and still play around with lengths up to 6 cal ????????????????
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  #68  
Unread 02-12-2010, 09:36 AM
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Re: 375/408 Banded Solids Test

Dave, I know you are testing the newer rky mtn this weekend, but I can't keep up with all your rifles...What twist will you be using in 375 cal????????????


KZ
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  #69  
Unread 02-12-2010, 09:49 AM
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Re: 375/408 Banded Solids Test

Kelly,
I only have one test rifle, gain twist barrel. 16 to 7.75"

Dave
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  #70  
Unread 02-12-2010, 10:22 AM
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Re: 375/408 Banded Solids Test

Quote:
Originally Posted by Augustus View Post
Upon striking a median these bullets have a very predictable habit of the first 1/2 inch of the long thin nose folding to one side. It dont seem to take a lot of impact for the nose to bend ninety degrees to the body. When I fired it into the clay the nose completely folded back and the body also bent causing the recovered projectile to look like a doughnut with a little tiny whole in the center. Right now I cant tell you how fast this will happen when striking a game animal; however it dont seem to take much to get at least the first 1/2 inch of the nose to go ninety degrees. These bullets are copper and after they have been perfected there may be a oxygen free copper version that will deform more quickly. Just as it is I think on Mule deer and Elk this thing would be devastating. The hunting applications of this projectile is still a big question mark. We will see. I dont know if it would be legal in some states.
Augustus,,,On a big game animal, do you suppose this bullet would doughnut up and pass through the body on a straight course or would it alter its course significantly. I know you have not tried this, but what is your educated guess?

I try to recover most bullets on our big game, especially the ones we kill over 900 yards. Most have been SMK''s and they ball up real well. Not sure what a doughnut would do, but it sounds devestating if it did'nt alter its course????
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