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#5416495 - 11/12/14 05:34 PM Practicing in this weather...
Deerhunter61 Offline
THF Trophy Hunter

Registered: 08/27/08
Posts: 5501
Loc: DFW
So are any of you practicing in this weather? I plan to go Friday afternoon to work on a little load development...need to get the MV on my 6.5 Creedmoor and then I'm going to head over to the 1200 yd range and send a few down range! I love shooting in the cold weather!

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#5416683 - 11/12/14 07:13 PM Re: Practicing in this weather... [Re: Deerhunter61]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Shot in it all day yesterday with a 10+ mph north wind. Just made a cold bore shot at 500 the day before with a 20 mph south wind. Weired the winds can be that strong out of both directions one day to the next.

But in the cold you had better be able to get the density altitude and temp factored in prior to your shot. 80F DOPE aint the same as 40F DOPE.
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#5417257 - 11/12/14 11:06 PM Re: Practicing in this weather... [Re: FiremanJG]
txtrophy85 Offline
THF Celebrity

Registered: 08/12/05
Posts: 22038
Originally Posted By: FiremanJG
Shot in it all day yesterday with a 10+ mph north wind. Just made a cold bore shot at 500 the day before with a 20 mph south wind. Weired the winds can be that strong out of both directions one day to the next.

But in the cold you had better be able to get the density altitude and temp factored in prior to your shot. 80F DOPE aint the same as 40F DOPE.


Question for the ignorant.... What difference does it make between 80 degrees and 40 degrees?
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Originally Posted By: Nogalus Prairie
I think the deer hunting shows and "Bro' Country" are going to be the downfall of this once-great nation.

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#5417260 - 11/12/14 11:10 PM Re: Practicing in this weather... [Re: txtrophy85]
HorizonFirearms Offline
Pro Tracker

Registered: 05/05/10
Posts: 1616
Loc: College Station, Texas
Originally Posted By: txtrophy85
Originally Posted By: FiremanJG
Shot in it all day yesterday with a 10+ mph north wind. Just made a cold bore shot at 500 the day before with a 20 mph south wind. Weired the winds can be that strong out of both directions one day to the next.

But in the cold you had better be able to get the density altitude and temp factored in prior to your shot. 80F DOPE aint the same as 40F DOPE.


Question for the ignorant.... What difference does it make between 80 degrees and 40 degrees?


cool exercise. Go to like the G7 ballistics program (free) and input different variables for your rifle and you will be surprised what differences it makes.

Temperatures deal with air densities and can also jack with the burn rate of your powder depending on your load and change your MV therefore changing your point of impact. Good information to know if you shoot distance.
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#5418269 - 11/13/14 01:05 PM Re: Practicing in this weather... [Re: Deerhunter61]
ChadTRG42 Offline
THF Trophy Hunter

Registered: 09/16/09
Posts: 9413
Loc: Lewisville, TX
^^^ This is why I don't recommend the BDC type turrets.
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www.DallasReloads.com
Type 01 and Type 06 FFL

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#5418305 - 11/13/14 01:22 PM Re: Practicing in this weather... [Re: Deerhunter61]
dee Offline
Extreme Tracker

Registered: 04/10/10
Posts: 4664
Loc: Red River way
I shot a good bit in below 30° temps last year. I think you can hear the steel better.
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"A vote is like a rifle; it's usefulness depends on the character of the user" Theodore Roosevelt

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#5418441 - 11/13/14 02:10 PM Re: Practicing in this weather... [Re: Deerhunter61]
BigPig Online   content
THF Trophy Hunter

Registered: 08/27/09
Posts: 9498
Loc: Forney, Tx
yesterday i ran 300 rounds through the AR and 150 through the pistol, my hands were froezen but it gave me good practice on trigger control with cold fingers, also made me focus on mag changes and failure drills.
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Originally Posted By: bill oxner
Ever spit it out rather than swallow it?

Originally Posted By: pegasaurus
Enjoy it while you can. One day you might be complaining about NOT getting random pop-ups in the morning. grin

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#5418538 - 11/13/14 02:57 PM Re: Practicing in this weather... [Re: Deerhunter61]
Bullfrog Offline
THF Celebrity

Registered: 01/21/11
Posts: 10596
Loc: N-Bedford
The G7 don't like my iPhone.
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#5418585 - 11/13/14 03:12 PM Re: Practicing in this weather... [Re: txtrophy85]
FiremanJG Offline
THF Celebrity

Registered: 12/16/08
Posts: 17893
Loc: Wolfe City, TX
Originally Posted By: txtrophy85
Originally Posted By: FiremanJG
Shot in it all day yesterday with a 10+ mph north wind. Just made a cold bore shot at 500 the day before with a 20 mph south wind. Weired the winds can be that strong out of both directions one day to the next.

But in the cold you had better be able to get the density altitude and temp factored in prior to your shot. 80F DOPE aint the same as 40F DOPE.


Question for the ignorant.... What difference does it make between 80 degrees and 40 degrees?


Cold air is dense air. Dense air causes a bullet to lose velocity more rapidly. Tuesday I was shooting a friend's 308 Win to 800 yards. I had DOPE from 80 degree weather. Well, to get my client to get hits at 800 yards I had to add .4 Mil to the elevation. Bullet slows down in flight, bullet falls to earth more, raise elevation in the scope to compensate. Keep in mind 308's are very sensitive to this outside 500 yards. A 6.5 Creedmoor or 7-08 will hold up better to about 700 then temp becomes more of a factor. That's BC and MV for ya.
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#5418604 - 11/13/14 03:21 PM Re: Practicing in this weather... [Re: Deerhunter61]
ChadTRG42 Offline
THF Trophy Hunter

Registered: 09/16/09
Posts: 9413
Loc: Lewisville, TX
Another example. Many years ago when I first started shooting longer ranges, I had a feeder we set up from camp that was exactly 640 yards away. I put a 10" steel plate hanging next to it. I get to camp one afternoon and confirm my dope at 640 when it's 75-80 degrees. The next morning, I take a shot at a doe when it was about 30 degrees. I missed right under her belly. It was all due to the low temps. You must account for EVERYTHING when shooting out past about 400 and 500 yards.
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