I'm new to reloading and trying to figure out meaning of "wipes" for hot loads.

Get at least two good reloading manuals and read them every day for a year. I have been reloading since 1968 and I still read them all the time. Ken Waters' Pet Loads is here right now.
Now, wipes are the marks left on brass case heads from high pressure forcing them into the bolt face, then when you turn the bolt, it "wipes" off the protruding brass into the ejector hole, or slot.

THIS PHOTO IS A SIGN OF HIGH PRESSURE. REDUCE THE POWDER CHARGE>The primer flowed back into the firing pin hole. Then "primer wipe" took place. This is where a ring around the firing-pin impact bulges out far enough to get squished or sheared off flat by the breech-face as the pistol goes through its unlocking process, leaving an area that looks like a razor was used to slice off part of the primer. KAHR'S DEFINITION IS DIFFERENT AND NOT THE SAME. SEE OTHER ALBUM FOR THAT PHOTO. "Primer wipe" is a teardrop-shaped firing pin impression, accompanied by a drag mark (scratch or gouge) following the "point" of the teardrop and leading away from the primer, sometimes into the brass. This is because the firing pin does not fully retract after the round has fired and the slide is traveling back during ejection, causing the case to drag across the firing pin as it is thrown clear. It is not in any way harmful, except sometimes to the case if the primer pocket edge is gouged. Kahr will tell you it is a normal condition for their pistols, even saying so in the owner's manual. The 1911 has an INERTIA firing pin. A type of firing-pin in which the forward movement is restrained until it receives the energy from a hammer blow. It is slightly recessed in the breech face before being struck by the hammer and is shorter in length than the housing in which it is contained. Upon hammer impact, it flies forward using only its own kinetic energy to fire the primer. The pin would retract into the housing after firing the primer. This lets the primer flow into the hole. Then its wiped.

As seen, different folks can use the same slang term for different things--and both are correct for their lingo.
One reason to call things what they are.
Check manuals and Google for "cartridge pressure signs."

Wipes, in the usual sense, are in the brass head. When primers flow back, it is something else.