dcmdon,
I too found sin's response overly personal and completely lacking in the details requested. Specifically, the reasoning for any of his statements.
His statements imply:
Hollow points are prefered, but do not offer sufficient reliability in auto-loading handguns, so FMJs are prefered.
1) His side point is 100% true, even if he never pushed it. You should be 100% comfortable with the reliability of the ammunition in your "stash" in your weapon of choice. If you are not 100% comfortable with its reliability, seperate it out so you don't count on it in an emergency. This applies to both FMJ and HP.
2) Running 20 rounds of any ammunition through a firearm (FMJ or HP) does not demonstrate reliability. I only shoot a magazine of my carry ammunition through my gun during a normal range visit, but I bought 500rd and tested the reliability of that ammunition in my firearm before I started carrying it. I am perfectly confident in the reliability of my carry ammunition in my carry weapon. I would be confident stocking that ammunition for an emergency.
3) Sin also touched on the range of a pistol. The US Marine Corp teaches use of their sidearm out to a range of 50m. That is great when it is your only available weapon and your life may depend on taking and hitting that shot. I have been known to take practice shots with my 10mm at IDPA torso targets at 100yard. I wouldn't take a hunting shot with a handgun at 50 yards unless it was my only available hunting tool. A handgun is a weapon of oppertunity not a weapon of choice. A handgun is selected when a rifle is unavailable or impractical (like a carry weapon)
Changing ammunition does change point of impact. Unless your sight / barrel centers are off, ammunition changes should have very little change in point of impact in Azmuth (Right / Left) but could have a significant change in point of impact up and down (bullet weight, ballistic coefficient, muzzle velocity all have a large effect on this) but two different bands of FMJ could have similar changes in point of impact.
If you are concerned about this, take a sample of each ammo to the range and not the chance in point of impact for each ammunition and record them on the box. If you have to use the ammunition in an emergency, it's noted right there how you have to adjust your sights or your point of aim to adjust for that ammunition.
If you can afford to verify the reliability and point of aim of all of your firearms with hollow point ammunition and still stockpile an acceptable amount, by all means, do so. However, lets be practical. The "meat' of your stock-pile is going to be inexpensive ammunition for cost reasons. That could be lead round nose, FMJ or otherwise.
I would recommend to everyone to verify reliability in at least a few firearms for rounds that are better suited for hunting and self-defense, especially for handguns. Note their point of impact on the stash and set some aside.
And don't assume FMJ ammunition will be reliable because it's FMJ. Check it out and make sure. When the chips are down is not the time to find out that the cheap stuff doesn't run well through your gun.