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Author Topic: Texan 308 world recored  (Read 2661 times)

DAVID

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Texan 308 world recored
« on: July 16, 2017, 07:27:30 PM »
Today I shot the 308 Texan at 1107 yards and have the hits target is 22 inches
David


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steveoh

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Re: Texan 308 world recored
« Reply #1 on: July 16, 2017, 10:04:54 PM »
I'm happy if I hit the rats at 25 yards. 1107 yards!?!? Whoa, that's some fine shooting!
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DAVID

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Re: Texan 308 world recored
« Reply #2 on: July 17, 2017, 03:33:21 AM »
MY next target is 1201 yards
David
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Christopher

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Re: Texan 308 world recored
« Reply #3 on: July 17, 2017, 08:36:54 AM »
What weight bullet are you shooting? And how fast? And just out of curiosity what is the drop you are allowing for? :o

Thanks
Chris
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DAVID

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Re: Texan 308 world recored
« Reply #4 on: July 17, 2017, 11:40:01 AM »
The bullet is Hunters Supply 154 gr spire point  BC .271
velocity is 986 fps 332 ft lbs
833 clicks up 1/4 inch  = 2289.2 inches  ft lbs at 1100 yds is 217
scope base is cold shot m.o.a.b. 300 minuets
scope hawk frontier 2.5x15 120 moa
scope center line is 4 inches to bore center line 8)
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Christopher

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Re: Texan 308 world recored
« Reply #5 on: July 17, 2017, 01:54:22 PM »
Thanks for the response.....sounds like you've got it figured out.  What program are you using to determine your energy at 1100 yards?  217 fpe seems pretty high to me. But I may be wrong.  :-\

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Chris
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DAVID

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Re: Texan 308 world recored
« Reply #6 on: July 17, 2017, 02:08:30 PM »
Hornady  ballistics calculator
Here is what is left from bullet at target base so I would say the calculation is spot on ;D
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Christopher

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Re: Texan 308 world recored
« Reply #7 on: July 17, 2017, 02:56:39 PM »
Copy that. Certainly looks like it hit with authority

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Chris
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rsterne

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Re: Texan 308 world recored
« Reply #8 on: July 18, 2017, 05:59:08 PM »
Congratulations on a some spectacular shooting.... I am a bit confused by the 217 FPE remaining at 1100 yds., however, that would be 796 fps, which would require a BC (G1) of about 0.75,  not 0.271.... Using a muzzle velocity of 986 fps and a BC (G1) of 0.271, works out to 570 fps at 1100 yds (111 FPE).... This makes the shot even more remarkable, of course.... I used the JBM Ballistics Calculator and assumed the BC quoted was for your local conditions....

Bob
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DAVID

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Re: Texan 308 world recored
« Reply #9 on: July 19, 2017, 08:22:10 AM »
Hello Bob long time
I am using G7 with Hornady Ballistics Calculator, it is not the best for lead bullets but it will put you in the right starting point.
As you know there is no real formula for lead bullets  what speed do you think it is traveling with these recovered bullet fragments recovered at the
1107 target? ( 20/1 LEAD) The BC .271 is taken from RCBS CAST BULLET book this is a RCBS  308 150 SP, this mold has been discounted from there line of molds but it has work very well in air guns and powder burners.
The Texan has a 1/14 right hand barrel will work with bullets up to 198 grain at close range 300 yards past 300 yards you need to stay with 171 or lighter this is what I have found shooting the 308 Texan.
« Last Edit: July 19, 2017, 08:24:28 AM by DAVID »
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rsterne

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Re: Texan 308 world recored
« Reply #10 on: July 19, 2017, 10:38:49 AM »
NO idea what the velocity would be from that impact photo.... The only way to determine a BC is to make actual measurements.... I prefer two velocities, the further the separation the better.... With your accuracy at 1100 yards, you should have no qualms about hitting the Chrony at 200 yards.... I'm still betting that the G1 Model would be better for that bullet....

Bob
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Alan

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Re: Texan 308 world recored
« Reply #11 on: July 19, 2017, 11:45:11 AM »
This is when a Labradar would come in very handy!
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DAVID

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Re: Texan 308 world recored
« Reply #12 on: July 19, 2017, 06:04:26 PM »
NO idea what the velocity would be from that impact photo.... The only way to determine a BC is to make actual measurements.... I prefer two velocities, the further the separation the better.... With your accuracy at 1100 yards, you should have no qualms about hitting the Chrony at 200 yards.... I'm still betting that the G1 Model would be better for that bullet....

Bob
Hello Bob
The BC is right out of RCBS cast bullet reloading book for the RCBS 150 SP bullet. this is RCBS 150 sp,
RCBS has the money to spend on their bullet design so this is what I will use .
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rsterne

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Re: Texan 308 world recored
« Reply #13 on: July 19, 2017, 09:16:30 PM »
Sorry, I googled that bullet -  RCBS 150 sp  - and came up empty, it appears to be obsolete, not even listed on the RCBS website that I could find.... Could you please provide a link to the BC specifications, along with it being done with the G7 Drag Model?.... I have never heard of the G7 model being used on flat-based bullets, it makes no sense as the G7 standard projectile is a boattail....



Bob
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oldpro

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Re: Texan 308 world recored
« Reply #14 on: July 19, 2017, 09:28:50 PM »
 This is not going to end well for obvious reasons.
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