Balistics

Moose guy · #1 08-20-2016, 05:42 AM

Any ballistic gurus out there ? I have a question please, firing 175gr.federal premium trophy bonded bear claw from my 7mm rem mag.what effect if any does temp. Have on down range point of impact .ie, today shooting at temp,+26 then in November shooting at a temp. Of say - 26 degrees . Thankyou in advance.:

Dick284 · #2 08-20-2016, 05:53 AM

Your muzzle velocity will decrease, and your apt to have a totally different percentage of humidity, and a totally different air density.

All this means is your trajectory will be different.

How much, well that would require a call to the psychic hotline, or re confirming the muzzle velocity with a chronograph and cyphering the new data into a ballistics program, or better yet shooting the given load at distance under similar conditions.

Tough nut to crack, eh?

But that's why there are no absolutes.

Shoulda been finding your hunting load in February instead of August in all reality, but maybe you didn't own the rifle back then, who knew, so much would ride on all this till you got hip deep in it.

One last thing, don't be thinking you'll shoot anywhere near the same in the colder temps either, because you'll be dressed like the Michelin man too.

The scourge to all this long range wannabe stuff, is exactly this.

Newview01 · #3 08-20-2016, 07:16 AM

This website has a lot of good info, although I can't guarantee it will tell you what you need.

http://www.ballisticstudies.com

Dean2 · #4 08-20-2016, 07:40 AM

Under 400 yards, not enough to worry about, you won't even notice. If you have to ask this question and are planning to shoot over 400 yards you need to do a bunch of reading and lots of practising in different weather conditions. I don't mean to offend but I would venture to say you are not ready now to shoot at game over 300 yards.

Dick284 · #5 08-20-2016, 07:53 AM

Quote:

Originally Posted by Dean2

Under 400 yards, not enough to worry about, you won't even notice. If you have to ask this question and are planning to shoot over 400 yards you need to do a bunch of reading and lots of practising in different weather conditions. I don't mean to offend but I would venture to say you are not ready now to shoot at game over 300 yards.

Factory ammo shooter too.

The realities are stark and brooding in this situation.

Any feedback will be difficult to deliver to satisfy the apparent level of knowledge possessed by the op.

Grizzly Adams · #6 08-20-2016, 08:00 AM

Take it out just before the hunt and confirm impact point, not just temperature can change in that time period.

Grizz