Hey,
I use the Tulla on my hand gun but would not use it on my rifle....
First off keep in mind that these are steel casing and some ranges will not allow you to shoot steal ammo (Atleast where I'm at, 1 of 3 ranges will turn you away)
I can't say specifically for the one you are looking at but a lot of these cheaper rounds are laquer coated. Using it on your hand gun with a magazine of no more then 17 you wont cause any real problems.
But when you are firing them on your rifle in larger quantities your chamber is getting hotter and hotter at one point the laquer on the rounds starts melting.
So if you happen to chamber a round in between firing while the chamber is still hot and let it sit there for a couple minutes. that round will get stuck to your chamber. There are some videos online showing rounds stuck in the chamber and how hard it is to remove them.
Lastly keep in mind that these are very very dirty rounds.
So giving the size and quanity issue, I use them in my hand guns because they are so cheap but would not fire them from my rifle.