Beretta model 84 FS BB pistol: Part 2
by Tom Gaylord, a.k.a. B.B. Pelletier
Today, we’ll look at the velocity of the Beretta model 84 FS BB pistol. We’ll also look at the trigger and the shot count.
Of course, the first step to shoot a CO2 BB pistol like this one is to install a fresh CO2 cartridge. And when you do, never forget to put a drop of Crosman Pellgunoil on the tip before piercing. The oil will be blown through the gun, coating every seal on the inside and sealing it tight for a long time. I found the cartridge sealed immediately after it pierced, so this pistol is conventional in that respect. Remember — once the cartridge is pierced and the gas stops hissing, you don’t want to tighten the screw any more or you’ll soon tear the face seal that the cartridge butts against, creating a leak.
The BB magazine holds 17 BBs comfortably, and 18 can be forced in. I loaded them one at a time, but in this mag, they load easily.
Umarex Precision BBs
Thye first BB I tested was the Umarex Precision BB. In past tests I have found this BB to be one of the 2 top BBs on the market for precision and size uniformity. They tend to be larger in diameter, which means they give the best velocity.
These BBs averaged 368 f.p.s. for 10 shots, but I did notice the gun is very susceptible to velocity dropoff if the shots are fired fast. When I waited at least 10 seconds between shots, the velocity held steady; but if I fired 2 shots quickly, the second one was always much slower. In one test, the first shot went 372 f.p.s. and the next shot…fired a second later…went 358 f.p.s.
The fastest shot in the string went 385 f.p.s. and the slowest went 356 f.p.s., so the spread was 29 f.p.s. However, the first 3 shots on a new cartridge always go much faster than the average. If we eliminate those 3 shots from this string, the average drops to 363 f.p.s., which seems like a more reasonable average.
Daisy Premium Grade BB
Next I tried the Daisy Premium Grade BB that’s the other top BB on the market. These BBs are also very uniform and very consistently sized. Ten of them averaged 357 f.p.s., with a spread from 350 to 373 f.p.s. That’s a 23 foot-second spread.
The Daisy Premium Grade BB is as good as BBs get, unless you opt to buy the special Avanti Precision Ground Shot that are the finest BBs available today. But they only show their advantage when used in the equally superior Daisy Avanti Champion 499 BB gun. If you shoot them in anything else, you’re wasting money as sure as someone who loads target rimfire ammo into a semiauto sporter.
Crosman Copperhead BB
The final BB I tried was the Crosman Copperhead BB. This BB is not as consistent as the other 2 because the diameter varies, causing velocity variations. You probably won’t find any flat spots on these BBs, but the diameter inconsistency puts it into the second rank for both velocity and accuracy.
In the 84 FS, Copperheads averaged 348 f.p.s., but the spread is very revealing. The low was 314 f.p.s., and the high was 375 f.p.s. That makes the spread 61 f.p.s.
After shooting 64 BBs (there were many that didn’t register on the chronograph, plus I filled the magazine with each type of BB and then shot the rest of them without recording the velocity), the next few Daisy BBs went 317, 306, 301 and 294 f.p.s., respectively. So, the liquid CO2 was exhausted at this point, and the gas pressure was dropping.
Shot count for a CO2 cartridge
I continued to shoot the pistol until the blowback no longer worked. That happened at shot 78, so that’s the number of shots you can get from the gun. By that time, the gun is shooting the Daisy BBs in the mid-200s, meaning that about 100 f.p.s. have been lost since the cartridge was fresh.
The blowback on this pistol is faster than the blowback on most air pistols, because the slide doesn’t come back as far. When the CO2 cartridge is fresh, you just feel an impulse when the gun fires, but I wouldn’t call it realistic recoil. But as the gas pressure lowers, the slide starts cycling slower and you do feel the recoil.
Remember that I told you in Part 1 that the trigger felt strange? I said it felt like a double-action-only trigger instead of the single-action trigger that it is. Well, this time I tested it and proved that’s how it feels. Despite the slide cocking the hammer for each shot, the trigger is still very long and heavy.
The first-stage pull runs about 4 lbs., and stage 2 breaks at 9 lbs., 9 oz. every time. Pull the trigger slowly, though, and stage 1 becomes creepy, plus stage 2 increases by a full pound. This will be an interesting handgun to shoot for accuracy!
Evaluation thus far
I like how the 84 FS holds. It’s small, but not tiny. It fills the hand with its wide grip frame. But that trigger will be something to contend with. The trigger on my Micro Desert Eagle .380 firearm pistol is also DAO and also challenges me when I shoot farther than 20 feet; but it’s smoother near the end of the pull. This trigger stacks up a lot at the end of the pull. We’ll see!