I'm lumping these together as it does appear that the two are the same ammunition.
Hello
Most of the 38 Special reviews that I did were shot with two guns.
A Taurus 85 Ulta Lite 2 inch barrel and a Smith & Wesson model 15 with a 4 inch barrel.
First I do forensic exam of the ammunition. Next I shoot a group while chronographing with each gun. 10 yards with the 2 inch Taurus 85 and 25 yards with the 4 inch Model 15. Chronograph is a Oehler 35P
Then the ammunition is shot out of each gun into a 55 gallon plastic barrel of water. The bullets are then recovered, photographed and then measured for expansion. In cases where the bullet fragments and loses its jacket, a weight is taken with all the recovered material and also a weight taken with just the lead core.
Here is the link to all the photos of the review;
38 SPL COLT Defense 110gr HP +P — Postimages
38 SPL Doubletap 110gr C.E. HP — Postimages
Data Sheets
After doing the pull downs on both of these it became apparent they were the same product. The Colt box says it is +P. There isn't anything +P about this one. Both brands had virtually the same propellant charge and produced virtually the same velocities.
Then when shooting into the water the bullets produced no expansion what so ever. Not even an attempt. I couldn't recommend these loads for anything other than plinking.