Injecting the pecs

[Zoomster]

I am on my first cycle and have pretty much stayed with the glutes. I am getting tired of the same spots hurting for a day or two and I am beginning to increase the number of injections.
My question is, when hitting a muscle like the pecs are putting it straight into the middle of the pec? Same for tri's? Delts, in the center middle? It would make sense to hit the beefiest part of these area's but I would also like to know which one seems too have less chances of hitting a vein?

 

[Iceburg]

www.spotinjections.com this may help.

And there are spots you should go before the pecs. Quads, delts.

You can't really predict where a vein could be inside the muscle. So yes, go for a part of the muscle with more mass.