[SweatyMex]

I'll pick up my first P99 within 2 weeks from now.  I've been looking at bulk ammo at http://www.georgia-arms.com/ reccomended by Dr. Lunde.  My question is about grain.  What is the major difference between them?  Obviously weight, but how will these effect my firing?  

I really would like to zero in on one type of ammunition and stick with it.  As my Dad taught me way back when...  "Consistency with your practice will make you that much better when it's GO time."

 

[hube1236]

Try each. Your gun will love you more for it.

Realistically your practice ammo should behave similarly to your carry ammo. Each of the grain will behave a little differently in your gun. My gun LOVES Winney White Box 180, but hates GA 180. My P99 LOVES 165 GA especially most of all and I carry Federal 165 Hydros. They feel about the same.

Dan

 

[venom600]

You should definitely shoot all of them enough to make up your own mind! I tried all sorts of different ammo when I bought my P99 about 2 months ago and there were some definite personal preferences.

I've put over 1200 rounds through the thing so far. My favorite for range ammo is a toss up between Winchester White Box 165g FMJ and PMC 165g FMJ. The Winchester tends to be a little bit cleaner, but I've had zero malfunctions with any ammo so far (knock on wood), let alone these two.

I'd also second hube1236's suggestion about shooting a range ammo that has a similar feel to your carry ammo. That being said, my carry ammo is also Federal 165g Hydra-Shok. It feels very similar to both of the range ammo's that I mentioned.

 

[BrokenArrow]

The 155s and "full power" 165s are harder on the gun and shooter than the 180s and 165s at 1000 or less.

There is good reason why the FBI contracted for the 165 HS at 980 fps, and asked Speer to reduce the velocity on their new contract ammo (Speer 165 GD) from the 1150 fps specs.

As far as how big and how deep the holes are, doesn't make much difference at all. From RCMP, FBI, ISP tests:

bare gel, through heavy cloth:

147/9 HS 12.2/.63, 13.6/.58
147/9 GS 13.8/.61, 15.1/.61

155/40 HS 12.8/.61, 14.7/.60
165/40 HS 13.5/.63, 14.5/.60
180/40 HS 13.3/.67

165/40 GD 1150 fps 13.7/.74
165/40 GD 1076 fps 13/.65, 15.8/.60
165/40 GD 950 fps 14.5/.66