Thanks guys. I just wasn't sure if there was such a thing as going too deep with a needle. I know when I inject my glutes, I don't usually plan on pushing the needle all the way but it just kind of slides all the way in. I'm not really worried about pushing the needle all the way into my glutes since there is plenty of meat back there but wasn't sure in the deltoid region how far in you can go. Based on what you guys are saying, 1" seems the way to go for delts so appreciate it.