Bound's hubby here:
"Boker" has given you some very good information.
Actually, the .300 Winchester Magnum is a premier 1000 yard cartridge, if it is fired in an appropriate rifle. Buying just any Model 700 (whether in .308 or .300) does not make it a good target rifle.
The Remington 700 VLS (Varmint rifle in .308) or Remington 700 Sendero (Varmint rifle in .300 Win Mag) will make good chases for long-range target rifles, with additions .... and make excellent hunting rifles with appropriate scopes, if you are willing to heft a few extra pounds when afield. (I have an older Remington 700 Varmint Special in .308 Winchester with Redfield Palma sights and a Weaver K15 Scope modified with a target recticle for long-range competition.)
The primary ballistic differences between the .308 Winchester and the .300 Win Mag are:
1) The .308 has less recoil
2) The .308 is less expensive to shoot
3) The .300 provides a greater range of heavier bullets for hunting and/or long range (wind) conditions.
4) The .300 has a greater velocity, and such, greater terminal velocity and energy (at target)
Long Range target shooting has basically two courses of fire, the Palma Match (15 shots at each distance: 800 yards, 900 yards, and 1000 yards) which is shot with iron (target) sights only, and 1000 yard Matches (20 shots) fired with either iron sights or any sights, depending on the match conditions. The .300 Win Mag would be best suited only to the 1000 yard matches ... Palma rules limit "Palma" rifles to .308 Winchester.
Regardless of the caliber rifle you purchase, you need to have a heavy/bull barrel on the rifle, and make some additions and modifcations to your rifle:
1) An adjustable match quality trigger.
2) A high comb "marksman-style" stock.
3) An accessory rail with hand-stop.
4) Target quality (micrometer) sights and bases, front and rear.
5) A long range scope base with rings (Champion's Choice carries a long-range scope base with integral redfield rear sight base for about $120).
6) A high quality target scope of about 10-12x.
If you are planning to shoot long-range seriously (you better, since the above mods could cost you an extra $1500 to $2000 above the cost of your rifle), you need to purchase some additional shooting equipment (stool, spotting scope and stand, shooting mat) and give extremely strong consideration to becoming a competent hand-loader!
EDITED TO ADD:
About the .30-06 ... it is a FANTASTIC cartridge; however, it does have a small short-coming when used on the target line (one of the reasons it is fading from the long line). That short-coming is that the powder does not fill the case completely when properly loaded, allowing a large "air-cavity" within the loaded round.
This "air-cavity" affects the orientation of the gunpowder when the cartridge is loaded into your firearm. With the .30-06, this orientation can differ with each shot. The "orientation of gunpowder" is actually very critical (especially when shooting long-range) because it affects the ignition rate of the powder, which tends to lead to inconsistent burn-rates and inconsistent velocities, which WILL impact the external ballistics of the bullet critically!
A Military M72 target round (173gr FMJBT @ 2650 fps) is a good ballistic model to follow. The new load would be with Sierra's 175gr MatchKing ... aim for a velocity of 2650 fps with a standard deviation of no more than +/= 20 fps. Sad thing is, this deviation with most powders will be extremely difficult to achieve, solely because of the powder's orientation. When Military .308 M852 (Sierra 168 gr HPBT) or M118LR (Sierra 175 gr HPBT) is used, powder orientation is not an issue because there is not an "air-cavity" and the powder actually butts against the base of the bullet, which is the most preferable condition.
Master Class competitive rifleman
Expert Class competitive pistol shot
Reloader of over 124,000 rounds
Over 30 years of firearms and reloading experience.
· 1 decade ago