G'day,
Until I got my "Big Lube" mold I was loading smokeless bullets (coated and non) with a card wad and a wax "cookie" under tha bullet.
My wax "cookie" is made from a mix of bees wax and lanoline grease (about 50/50) and a little splash of "winter green oil".
( you may need to increase the wax content to accomodate your summer heat)
Pour into a flat biscuit tray about 1/4" thick and, when it solidifies, cut into strips about 1" wide.
As you load you place a card over the powder, press the flat end of a "stick" over the case mouth to cut a "cookie" straight into the case, wiggle it a bit to enlarge the hole for easy lift-off, plant a bullet and seat/crimp.
Another variation is to aquire felt wads of the correct size and soak them in the above mixture (while it's still melted) and use them instead of the cookie. These can also be used in Cap'n'Ball revolvers under the ball.
Hope this helps
I still load .357 with this method.