Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Hunting > Long Range Hunting & Shooting

Long Range Hunting & Shooting Nightforce Optics


Reply

Hunting drop charts?

 
LinkBack Thread Tools Display Modes
  #8  
Old 07-10-2013, 09:56 PM
Gold Member
 
Join Date: Jul 2011
Location: Near Napoleon,MI
Posts: 997
Re: Hunting drop charts?

Colder air = denser air = more drag = less velocity out to 400 = longer time of flight and with gravity being constant that = more bullet drop.

I think however that your moisture assumptions are way off. Hot air can hold a lot more moisture than cold air. You might have had 60-80% humidity at 100F and that may drop to 10-30% at 35F. If you add 10mph of direct cross wind the bullet is also going to be displaced sideways from the intended point of impact and this also lengthens the path the bullet travels slightly.

If you want to learn about ballistics, try just changing 1 variable at a time instead of 3. Otherwise it can be very difficult to grasp what is going on. Try just changing the temperature through several steps. Then go back to the original condition and try changing just the elevation or barometric pressure. The try changing just the relative humidity.

Then look on some weather sites for realistic weather conditions in hunting season and compare to your summer shooting conditions. Any time one actually does ballistic verification, it is essential that the weather conditions are all recorded since this data can be used to correct the original ballistic calculation to get the proper drop.
Reply With Quote

  #9  
Old 07-10-2013, 10:12 PM
Bronze Member
 
Join Date: Apr 2013
Posts: 92
Re: Hunting drop charts?

Thank you very much. I didn't look-up any data for today. I just made the assumption that it wasn't raining so there was no moisture. I guess I need to understand weather much more than looking out the window ;>}

I went to the rifle range for the first time on Sunday. First time ever firing a rifle !
I had the scope mounted at the store I bought it from and all first 3 shots were within the bullseye. at 100 yards.
I bought 3 boxes of ammo, one Winchester, One Remington and one Federal. I fired 10 rounds from each box and all hit the target in a tight pattern. So for my first time, with nobody showing me anything or assisting me I think I did pretty good.
I know there is a lot I don't know but, hopefully I'll learn enough to hunt safely and be successful.

Thanks again for the explanation.

Quote:
Originally Posted by westcliffe01 View Post
Colder air = denser air = more drag = less velocity out to 400 = longer time of flight and with gravity being constant that = more bullet drop.

I think however that your moisture assumptions are way off. Hot air can hold a lot more moisture than cold air. You might have had 60-80% humidity at 100F and that may drop to 10-30% at 35F. If you add 10mph of direct cross wind the bullet is also going to be displaced sideways from the intended point of impact and this also lengthens the path the bullet travels slightly.

If you want to learn about ballistics, try just changing 1 variable at a time instead of 3. Otherwise it can be very difficult to grasp what is going on. Try just changing the temperature through several steps. Then go back to the original condition and try changing just the elevation or barometric pressure. The try changing just the relative humidity.

Then look on some weather sites for realistic weather conditions in hunting season and compare to your summer shooting conditions. Any time one actually does ballistic verification, it is essential that the weather conditions are all recorded since this data can be used to correct the original ballistic calculation to get the proper drop.
__________________
Reply With Quote
  #10  
Old 07-10-2013, 10:41 PM
Gold Member
 
Join Date: Jul 2011
Location: Near Napoleon,MI
Posts: 997
Re: Hunting drop charts?

Does your range have just 25, 50 and 100 yard ranges ? If so then you need to find another place to shoot where you can stretch it out to at least 300 yards. 400 is better but at least at 300 one is starting to get significant wind effects and will notice the benefit of higher ballistic coefficient bullets.

As a new shooter, consider yourself lucky if you buy a factory rifle and it shoots great out the box. The odds are that the next 2 or 3 you buy might give you some headaches before you get them to perform, and some are only good as parts donors. Sad but true reflection on the firearm industry. Some companies test fire their weapons and provide the test target, but most US gunmakers do not.

Out of 5 bolt action rifles so far, 1 was lousy (there was basically no good part in it), a second needed tweaking to the stock then shot good, the 3rd shot 1/2" groups from the first range visit (Savage 10 PC 223), the 4th had a barrel that was so full of chatter marks it should never have left the factory (TC Icon). It is now discontinued and the factory has refused to sell me parts. TC is now on my BAN list. The 5th shot reasonably good (1moa) but the barrel could not stabilize the bullets I wanted to shoot. The truth is that no factory gun is made that would do it so I spent $350 on a custom barrel (which was shipped to me in 3 days) and I sold the original barrel with 80 rounds fired for $180 so my total out of pocket for the upgrade was $170. I can now shoot 95 and 105gr VLDs (243) to 1/2 min groups.

Since the 5th bolt gun, I now no longer buy new, I buy used actions and fit a match barrel from the getgo. That way I eliminate 95% of the headache associated with factory rifles in 1 move. The Savage donor rifles are often in the $300 price range (with accutrigger and stock) so unless I change the stock I usually end up with a match rifle for about $650. I try to be picky about the donors to get a good stock, it does not matter to me what condition the barrel is in or how many scrapes it has since I have it taken off in 5 minutes and factory barrels (except 26" varmint contour stainless barrels) are basically worthless. I have also yet to meet an accutrigger that I do not like. if I ever do, one can find takeoffs from people fitting aftermarket triggers for $60 as opposed to $200+ Remington or AR-15 triggers.

So if you stay with it, don't expect a smooth ride. You are going to have to either develop some problem solving skills, or stick to custom actions and barrels which work as intended with intense focus on quality control which is virtually absent in factory rifles today.
Reply With Quote
  #11  
Old 07-11-2013, 02:30 AM
Bronze Member
 
Join Date: Apr 2013
Posts: 92
Re: Hunting drop charts?

The range I joined for $30 per year has targets/gongs out to 800 yards.
Being new, i tried to stay within the 100 - 200 yard range targets.
I'm sure I'll make an attempt at the further targets once I get used to firing the rifle.
Out of the 30 rounds so far, I only got bit by the scope once ;>}
My fault as I didn't have the stock properly against my shoulder and, thankfully it hit my safety glasses so I only got a mark from one of the rivets that hold the nose bridge on the frame.

If you look up NYE, MONTANA (one horse town) and look about 1 mile directly north of the town you can see the range on Google map.
It's at an altitude of 5000 which is about where all my hunting will be done.
Travel about 5 miles west and you'll be in the 10,000 altitude range.
The Beartooth Mountain range.

http://fwp.mt.gov/
Hunting District 502
Either-sex
Mule Deer.
Either-sex White-tailed Deer
Antlerless Elk

Hunting District 575
Antlered Buck Mule Deer.
Either-sex White-tailed Deer
Antlerless Elk

Hunting District 520
Antlered Buck Mule Deer.
Either-sex White-tailed Deer
Antlered Bull Elk


Quote:
Originally Posted by westcliffe01 View Post
Does your range have just 25, 50 and 100 yard ranges ? If so then you need to find another place to shoot where you can stretch it out to at least 300 yards. 400 is better but at least at 300 one is starting to get significant wind effects and will notice the benefit of higher ballistic coefficient bullets.

As a new shooter, consider yourself lucky if you buy a factory rifle and it shoots great out the box. The odds are that the next 2 or 3 you buy might give you some headaches before you get them to perform, and some are only good as parts donors. Sad but true reflection on the firearm industry. Some companies test fire their weapons and provide the test target, but most US gunmakers do not.

Out of 5 bolt action rifles so far, 1 was lousy (there was basically no good part in it), a second needed tweaking to the stock then shot good, the 3rd shot 1/2" groups from the first range visit (Savage 10 PC 223), the 4th had a barrel that was so full of chatter marks it should never have left the factory (TC Icon). It is now discontinued and the factory has refused to sell me parts. TC is now on my BAN list. The 5th shot reasonably good (1moa) but the barrel could not stabilize the bullets I wanted to shoot. The truth is that no factory gun is made that would do it so I spent $350 on a custom barrel (which was shipped to me in 3 days) and I sold the original barrel with 80 rounds fired for $180 so my total out of pocket for the upgrade was $170. I can now shoot 95 and 105gr VLDs (243) to 1/2 min groups.

Since the 5th bolt gun, I now no longer buy new, I buy used actions and fit a match barrel from the getgo. That way I eliminate 95% of the headache associated with factory rifles in 1 move. The Savage donor rifles are often in the $300 price range (with accutrigger and stock) so unless I change the stock I usually end up with a match rifle for about $650. I try to be picky about the donors to get a good stock, it does not matter to me what condition the barrel is in or how many scrapes it has since I have it taken off in 5 minutes and factory barrels (except 26" varmint contour stainless barrels) are basically worthless. I have also yet to meet an accutrigger that I do not like. if I ever do, one can find takeoffs from people fitting aftermarket triggers for $60 as opposed to $200+ Remington or AR-15 triggers.

So if you stay with it, don't expect a smooth ride. You are going to have to either develop some problem solving skills, or stick to custom actions and barrels which work as intended with intense focus on quality control which is virtually absent in factory rifles today.
__________________
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes



All times are GMT -5. The time now is 10:55 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC