Re: 168gr to 800 yards
Grump, regarding the picture I took:
The range was 1,150 (lasered) yards.
The physical altitude was 2,900' ASL.
The more important density altitude number was closer to 4,000'.
These are FGMM 168 SMKs from a 26" rifle, exact muzzle velocity unknown.
Dsparil, "If it kills, it's good enough for me":
Most of the 168 SMKs didn't hit the (24" x 33") target at all during that session, and some went quite wide. They'll all kill, *IF* you can land one. IMHO, there are few things more aggravating, and less effective, than bullets going off call.
These same bullets have gone sideways before 1,000 at density altitudes near or below sea level.
For those who do not grip the concept of a "below sea level" DA, it is often encountered during high pressure and/or low temperature weather at ranges that are located near sea level, like Quantico, which is a little over 400' ASL physical altitude, depending up where one stands. We often have people in the pits that call the 800 yard line and tell us that "someone is subsonic". We ALL know who that someone is. When we go to 900, the pit crew advises "some keyholes on target". When we get back to 1,000, the pit crew tells us they cannot find the impacts. It's your money, buy the performance the YOU want.
Items to consider:
As Rijndael states, there is a definite difference between the Sierra 168 and the Hornady 168 <span style="text-decoration: underline">A-Max</span>.
Not all bullets destabilize as they enter the trans-sonic velocity zone, but 168 SMKs often/usually do.
One of our friends shoots FGMM 168 SMKs exclusively at physical altitudes near 3,900' ASL, and enjoys good results to at least 1,000 yards. He does not usually go to the targets after shooting, and may not note any that land sideways. His sentiments are similar to yours, in that "a hit is a hit".
So, it boils down to: "YMMV, within certain parameters".
If you shoot 168 A-Maxs, you may have better than average 168 results at moderately long range.
If you shoot Hornady's 168 BTHP, you may find yourself with the same problems *documented* by those using 168 SMKs.
If you shoot at higher altitudes and/or lower pressures, your overall results with lighter bullets in this lower density air will be better than average.
If ALL of your shots are within 800 yards, you may be able to use 168 SMKs effectively.
When talking about 168 SMK and 168 A-Max bullets, your wind drift is going to be substantially greater at longer distances than a 175 SMK or other well designed heavier bullet. At known distance courses, the wind is usually the greater evil anyway.
If you are looking for 100% reliability at distances beyond 800 yard, meaning that you can expect every shot to go exactly where you send it, a heavier bullet is recommended by just about everyone who ever shot this far.