I recently ran my first blast of Prop. I got pharma grade to reduce chances of PIP. First pin felt like I'd been kicked by a horse. Lasted about 2 days. I've been pinning EOD, each pin had less and less pain, now in my 4th week. No PIP. I've learned a couple tricks and I also think my body needed to get used to it. One, heat he gear in hot water. Two, push the gear in the muscle SUPER SLOW. I'm pinning 1ml per and take between 30 and 45 seconds to inject. Make sure you keep the needle very stable. I pin my quads so to have both hands and greater control/stability.