Literally did 2.5cc shots of 200mg/ml primo weekly last blast with a 3cc/25g combo, no problem. And I do possess a high level of hand strength.Nah, some of these higher density substances (namely, 200mg/mL primo) are nearly impossible to push through a smaller gauge needle; it has nothing to do with finger strength. You have to apply so much force to the point that the finger flanges start to bend. Going to 23g has solved it for me, though, and I honestly don't notice the difference from a pain perspective.
I am not talking down to you; I am glad you found what you like and am glad you shared because it will inevitably help someone else encountering similar issues.
But don’t mislead yourself or others that this is simply too difficult to consider. For one thing, besides hand strength, I’m sure specific brands for the syringe hardware & especially carrier oil/brewing matter. For example, my primo 200 was brewed in MCT - that’s definitely going to flow better than GSO.
For the record, pain should not ever be the issue with a sharp fresh needle - it’s accumulated scar tissue that is the concern. It builds up a lot faster than you’d think with even a 25g. The first time you jam through a big patch, it can be very disconcerting.