This topic contains 5 replies, has 4 voices, and was last updated by 4 months, 1 week ago.
October 31, 2013 at 6:43 am #8209
I have been hunting deer for about 40 years in New Jersey. Shotgun, muzzle loader or bow only.
My son and I have recently started rifle hunting in South Carolina.
We were down there several weeks ago and saw a lot of deer. The deer that we saw over were from 75 to 250 yards away. Where we are hunting is mostly thick with the corn on the dirt road to and or from our stands. The shots could be quick.
We are shooting 300 win mags,
My question is if I was to sight in at 100 yards, would it be 1 1/2″ high or what? How would I figure this out?
p.s. all opinions appreciatedOctober 31, 2013 at 8:14 am #8219
The question is, at what range do you want the bullet and crosshairs to meet.
It matters with what bullet 150,165 or 180. Here is how my 300 SAUM is sighted.
150 gr. Barnes TSX at 3200 fps.
100 yards 1.25″ high
200 yards dead on
300 yards -6.2
Here is how to figure it out. Just plug in your info.October 31, 2013 at 1:42 pm #8241
Joe, most of us here in SC zero our scopes to be 1″ high at 100 yards. Since most of our shots are 100 yards or less, with the occasional shot maybe between 100 and 200 yards, that’s sufficient. My brother shoots a Browning A-bolt in .300 Win mag and it’s topped with a Leupold Vari-X III, and he has it set to be 1″ high at 100 yards, just like I have my T/C Encore .308 and all of my other rifles.
NRA LM, NAHC LM, Buckmasters LM, Second Amendment Foundation, NAGR, GOA, Palmetto Gun Rights, DU, NWTF, QDMA, Everyday Hunter, My Fellow Hunter, American Sportsmen's Alliance, Deer and Deer Hunting, Hunt Talk, and proud SC redneck Rebel for life.October 31, 2013 at 6:17 pm #8253
Thank you for the chart, have to get the BC for my bullets
JoeOctober 31, 2013 at 9:09 pm #8260
I learned to hunt big game out west where you could see much further than you could shoot. I sight my rifles (.243 win (100 gr sierra BT), .270 Win (130 gr Nosler Par) and .338 Win Mag 225 Horn Spt) in to shoot 3″ high at 100 yards from the bench. Speciofically for my .270 with my loads (130 gr Nosler PAR with a measured muzzle velocity of 3100 fps) the zero range is about 275 yrds, the maximum above zero is about 4″ at 150 – 175 yards and at 300 yrd the bullet is about 2″ low. I have shot paper many times at 100, 200 and 300 yards and the actual performance meets the predicted. I now live in Maryland and my hunting friends think I am nuts is siting in at 3″ high at 100 yards because we rarely have a shot over 200 yrds here and in the 150 yard range the bullet is 4 inches high. However the deer usually fall over so they do not argue much with me anymore. I can shoot out to 325 yrds holding right on the center of the deer just behind the shoulder and not have to worry about whether the bullet will kill the deer if I do my part.
I imagine when you find the ballistic coefficient for the bullets you are using and given that you have a reasonably good estimate of the muzzle velocity you will find that if you site in at 2.5 to 3 inches high at 100 yards the 300 win mag will produce similar results as predicted by the ballistic calculator TGJ pointed you too. If you do not like the fact that the bullet will be 4 inches high between 100 and 200 yards then drop down a bit until you are comfortable.
For my varmint rifles (.222 and 22-250) I site in 1.5 inches high at 100 yards as prairie dogs and coyotes are bit smaller than a deer chest.
Have fun playing with it. Hopefully you have access to a range where you can verify the results of the calculator TGJ pointed you too.
Still Hoping for Improvement. . .November 1, 2013 at 7:10 am #8271
Thank you for the chart.
My range behind my house is 170 yards long. Looks like I will sight in dead on at 170.
Using these numbers 2978 fps, .473 BC, scope 2″ up, 180 grain bullet. With this sight in I do not have to think, just aim and shoot.
Again thank you,
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