Personally, I don't think Wipe-out is that great for removing copper. I also think Wipe-Out has a shelf life but I have no way of proving that, except it seemed to work good for a year or two. Then when I saw blue on a patch it was noticeably less than when I bought the Wipe-Out even after allowing it to soak overnight.
Bore Tech C4 works better for me, but it has it's own drawbacks.
1) It has an odor I don't care for.
2) It has a lousy for spout, which makes it difficult to dispense a small amount. So it causes waste. So I put it in a small plastic bottle designed for dispensing super glue, which solves that problem.
3) The cleaning ritual is significantly longer using BoreTech C4, but I don't care because my barrel id clean when I get done
Consequently I'll keep using Bore Tech C4 because it works well for me.
My Shilen stainless steel match select target barrel with ratchet rifling is not a cheap barrel. With ratchet rifling & a Tight-necked chamber, it cost me over $500.00 plus shipping. So you can rest assured, I'll take whatever time it takes to clean it properly.