Sunray
Regardless of shooter's skill, most typical 'big game' hunting cartridges, with any bullet weight, do not retain enough energy past 300, never mind 400 plus. Both the 7mm Mag and STW included. Neither is much different than a 150 0r 165 grain .308 at 500, energy wise.
entrance wound
This is the exit wound from 477 yards 7mmRemMag 140 gr Nos Bal Tip handload
I could see through the scope that it was bang flip with all 4 hooves rolling over.
The guy in the truck with the windows rolled up at over 500 yards could hear the bullet hit the animal and make hollow sound like shooting a prairie dog.
I built that rifle in 2013 and used in 2013
$300 gun show 6-23-2012 May 1963 Rem700 ADL with Hart 7mmRM stainless painted black barrel.
$230 Shilen stainless match #3 taper barrel brownells 9-18-2012
$232 High Tech Specialties [Bansner] stock brownells + many hours of trimming and fitting
$50 Burris low tactical rings brownells
$40 EGW one piece base swfa
$35 Holland recoil lug and pin brownells
$32 Large grind to fit Limbsaver recoil pad
$36 Vero Vellini sling
$12 Uncle Mikes 1" sling swivels
$14 Allen buttstock cheekrest shell holder pouch
$435 L4 VX-III 3.5-10x40mm. Matte, standard duplex, CDS, 24HCF 3-16-2013
$9 glow tape JVCC GLW, Amazon Oct 2, 2013
$114 bipod 9-13 SLM amazon Oct 5, 2013
$30 rear bag dog-gone-good Holland type 2x3x4"
$10 one part epoxy spray paint ALUMA-HYDE II AEROSOL, O.D. GREEN brownells + many hours waiting for high temperature
$0 sharpie marks on tape for ranges
$0 5/8 round Aluminum for pillars
$0 Pine for butt plug to attach recoil pad
$0 screws for recoil pad
$0 Devcon steel putty for butt plug, pillars, and recoil lug
$0 ammo
$0 bore cleaning
$0 rifle case
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$1572
This year, 2015, I built two rifles I used and tested to long range:
Dumoulin Mauser 6.5-06
Mosin Nagant 300WinMag
I shot a 3 deer, one at 629 yards this year.