02-26-2010, 06:07 AM
CO2 pellet guns loose psi because the cartridge is punctured when you install it. The vests don't puncture the cylinder until it is needed. No different than the cylinder sitting on a store shelf. But for peace of mind and for a little fun I set mine off every other year. I can inspect the vest and put a fresh charge in them. I trust them as much as any floatation devise but will wear these ones 100% of the time.
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