Syntherol-if it doesnt hurt, its probably not stretching you faschia enough to help with growth. But its not the same pain as infection or that high BA gives.
I believe gear will give a certain fascia swelling effect-escepially mixed with Syntherol! So Id say its effective-but not because of the AS, but because of the oil and the volume of it causing some fascia swelling. I think that esterfied gear is cleaved and released to blood before its effective. So, as Wylde said most effective would be Suspension and Winny-V as far as localized growth
which is not due to the oil stretching the fascia, but the actual steroid itself.
Bottom line-Id rather have swolen delts or arms, then glutes,
from injections. So I do all my injects as site injects.