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Feb 12th, 2024
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Re: Wind drift at 100 [Re: HicksHunter] #9142102 Yesterday at 03:17 PM
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Originally Posted by HicksHunter
And velocity, too. My Hornady 7prc precision hunter ammo was listed at 3k fps on the box, but only did 2800 on the Chrono from a 24" barrel.

I'm actually really disappointed in that one.


The 7 PRC has been the most F’d up cartridge from the start. Hornady came out with ammo that was too hot for most firearms. They were blowing primers and locking up bolts. They dropped their load dawn and kept the same speed on the box. I have customers calling me all the time asking about it. It’s an eye opener once they put a chrono on it.

There are many shooters who want the 7 PRC to be running fast close to 28 nosler speeds. They “read on the internet” it was a fast round. And when you start chopping barrels short for suppressors, it slows it down even further.

I have one customer who is a freakin’ Ricky Bobby shooter. It’s gotta go fast. If 2900 fps is possible, he thinks 3000 fps is possible and that’s what he wants. I finally told him to get a 28 Nosler and stop messing with the 7 PRC (after he bought 3, 7 PRC rifles!)


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Re: Wind drift at 100 [Re: 12th Man] #9142103 Yesterday at 03:19 PM
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Originally Posted by 12th Man
Originally Posted by ChadTRG42
I've been at the range all day. I ran 2 different programs, and came up with .8" at 100 yards for 10 mph full value wind drift with the data you posted. If the wind was at your 4 to 6 o'clock, it will be less than this, depending on the wind angle. My answer is find multiple ballistic programs and run the data through them and see what numbers you get. I've run it 3 times now and have the same data.


I was at the range yesterday. My Garmin Xero had your 178gr ELD-X 300 WSM ammo with an average spread of 3012 fps. Not far off from your published velocity on the box of 3000 fps. Can't wait to try the ammo out this weekend on our Snow Urial Ram hunt in South Texas


Really good to hear!! I try to get that velocity on the box as close to what I think it will be. Good luck on your hunt!

Chad


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Re: Wind drift at 100 [Re: freerange] #9142110 Yesterday at 03:24 PM
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In my very limited experience it seems I always see a G1 but only sometimes see G7. Do all brands give a G7?


My botnet is bigger than yours.
Re: Wind drift at 100 [Re: Mickey Moose] #9142115 Yesterday at 03:35 PM
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Originally Posted by Mickey Moose
In my very limited experience it seems I always see a G1 but only sometimes see G7. Do all brands give a G7?


Hornady and Berger do. Some others may. I look up the Litz G7 numbers from his book. You can also search for them online. Most are posted.


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Re: Wind drift at 100 [Re: freerange] #9142297 Yesterday at 09:48 PM
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WHO is capable of actually testing a true BC???
It’s not something an individual can do is it? And if you cant test it yourself then I assume you have to trust someone else at some point…..?


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Re: Wind drift at 100 [Re: freerange] #9142333 Yesterday at 11:05 PM
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My range is long enough to test muzzle velocity. It is not long enough to test B.C.

You've got to trust some folks to give you the B.C.

Hornady and Berger seem to be trustworthy after thousands of rounds of theirs fired. Some of them well past 1000 yards.


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