The Bulk Pack Remmington will shoot just fine in either of the 678 Series Rugers you are considering.
The BIG problem is that you will experience 3 or 4 missfires Failure To Fire)with the Remmington Bulk Pack Brass Plated Hollow Points.
The same problem happens all over the US, so if it happens to you, don't blame your new Ruger - it's Remmington's lack of Quality Control.
The KMK678GC is a very popular, and extremely accurate Target Pistol.