The standard caplock requires the spark to travel downward at an angle to reach the powder, offering less reliability and a longer ignition time than in-lines. On more than one occasion I've had hang-fires with standard caplocks, or instances when the gun failed to fire, period. It's never a happy time when you've worked hard to outwit a bird, only to have your gun go south. To make matters worse, spring turkey hunting is often done during rainy periods, thus increasing the odds that your gun won't fire. There's not much you can do, though there are some protective covers on the market that sheath the ignition workings.
Most hunters use an assortment of gadgets that assist in the loading process.
The powder is dumped into the barrel, a shot wad cup is dropped in and the shot is inserted into the cup. To keep the shot from trickling out when the muzzle is aimed downward, an overshot wad is placed on top. This is followed by some sort of stopper, such as a patch that keeps the pellets from rolling out the barrel, which, other than being humorous, is not conducive to collecting your bird. Too Many Toms Reliability is of paramount importance when you know you'll have only one shot at a gobbler. Tim Mariner, who works on the Nail Ranch where we hunted, had most of the roosting areas nicely pinpointed.