[DanielDudley]

I use a grout bag. I make the hole as big as I want, and I put it in wet. I use use masonry cement if I am mixing with sand, and sometimes I fortify pre mixed with acryl 60, which makes it creamier, and sets up better. Masonry cement has lime in it, which is sticky on a surface. Portland cement does not, and it won't stick as well or have as nice of a consistency.

As has been said, shoot it in wet, let it sit for a while before hitting it with steel. as far as penetration goes, you want it deep, you don't have to fill every void. If you can prep an eight foot section, you can use the grout bag and go along, then go back as it gets more firm and trowel it out. When you use the grout bag, roll up the open end of the bag to seal it, and squeeze it out like frosting. Keep kneading the grout bag near the tip, to keep the mortar flowing and pliable. Don't let it sit in the bag. Use it now and keep using it or empty it. Keep Kneading, and don't be afraid of juicy mortar mix or a larger hole in the bag. You don't need the metal tip that comes with some bags, it only prevents you from kneading near the tip and keeping tings from setting up. Keep stirring your mortar periodically when it is in the bucket or wheel barrow. Setting up occurs faster if you don't. Keep it moist.