Re: Upgrades help
Rap4 barrels are very tight-bore, i have a spyder classic with a problem with the ball detent. The ball would just not stay in the gun while pointed downward, they roll straight trough a j&j. switched barrels, now the rap4 act as ball detent. This could cause chops depending on the marker.
On my experience, a j&j has better range and overall accuracy than a rap4, but the rap4 has something special hard to describe. It feels more ballistic, and the shots are affected by wind in a different manner than other barrels, its a bit more controlable if you can spot wind direction.