Trajectory Chart

Best use for each cartridge: 300 Whisper   (Tactical purposes) .223 Rem.   (Military competition) .308 Win.   (Long range target & deer hunting) 300 Win. Mag.   (Extreme long range deer hunting)

Special Features of these Cartridges

300 Whisper

This cartridge was designed to be fired in a carbine, through a silencer.   The bullet must be subsonic (below 1075 fps) to avoid breaking the sound barrier, because a supersonic "crack" makes almost as much noise as a gunshot.   At 1050 fps you have an extremely quiet round that would be very weak unless the bullet is quite large.   The huge Sierra 220 grain HPBT bullet was selected because it gives the cartridge power and accuracy out to 300 yards.   The outside dimensions of this round were also an important consideration.   The 300 Whisper cartridge was designed to function in an M16 or AR15 rifle after just replacing the barrel.   This cartridge was invented by J.D. Jones in Ohio.   You can see several unique weapons that he builds by linking to his web site from our directory.   I got a shortened custom AR-15 from him a few years ago with a his silencer and it's unbelievably quiet, accurate, powerful, reliable, and a lot of fun to shoot.

.223 Remington

This cartridge was originally designed for the US military using a 55 grain full metal jacket bullet.   This round is a pleasure to shoot because it has very little recoil and it is easy for almost anyone to shoot well.   Another nice feature of this cartridge is that you can carry a great deal more ammo with you, because it weighs a lot less than most comparable ammo.   I use a moly coated 69 grain hollow point bullet in this cartridge because it has a better punch out to 600 yards, it's more accurate and it's easy to keep clean.   The original 55 grain bullet is too light and is quite wind sensitive at long range.

.308 Winchester

This cartridge is a favorite of mine because it is an inherently accurate round and has sufficient power for deer hunting.   I use a 168 Grain Sierra Hp Match bullet for long range target shooting.   All of my .308 rifles shoot their best groups with this bullet at 2650 fps.   For deer hunting I use a 165 Grain Sierra boat tail bullet.   I've had great luck with the .308 Winchester but I would not attempt hunting shots beyond 400 yards with this cartridge because the power drops off a little too much beyond that point.

300 Winchester Magnum

This cartridge was designed in 1950 and is still a very popular caliber today.   However, factory ammo is loaded with bullets that usually weigh at least 150 grains.   This cartridge generates serious recoil when fired in a lightweight hunting rifle and it is a bit too much for most hunters.   I discovered a very accurate 130 grain Hollow point, flat base bullet made by Speer.   It delivers consistant MOA accuracy in my hunting rifle and the bullet can be driven to 3420 fps.   This particular bullet has a very flat trajectory and the recoil is similar to shooting a .308 Winchester.   The only limiting factor is that this bullet is a bit wind sensitive at long range.   If you ever get to hunt deer at long range, this is a great choice.   This particular bullet was originally designed to be used on varmints.   The best expansion with this bullet on deer-sized game occurs at 300 yards or beyond.