Ok, Test 2 is complete (Hot, reloaded Silvertip) with some impressive results:
The reloaded Silvertip definitely had better results. Expansion was slightly better, at .844" maximum, .716" minimum. The bullet had almost expanded fully. This load out of a G20 should expand even more, and may produce around .9-1.0" of expansion. Penetration was just over 9", vs. 6" for the factory Silvertip. This should equal about 18" in tissue, or gelatin. Retained mass was 168.3gr without the four petals that broke off, 174.4gr with the petals. Jacket separation did not occur.
The wax tube showed a permanent stretch cavity of about 1.7" in diameter (best result yet), and the temporary cavity was much worse. I have found that I need to cut open the tube right there on the range. I always wait to get home to cut it open, and today found out that it rebounds to some extent. Right after shooting, there was a chamber almost 3" in diameter just inside the entrance hole. After sitting around for a couple hours, the hole rebounded slightly.
Edited to include load data:
This load is slightly OVER BOOK MAX, so please be careful, and start lower and work up observing pressure signs. This load was as follows: Remington nickel brass, CCI 300 primers, 10.2gr 800-X, Winchester 175gr Silvertip, COAL 1.260". This round looks really cool being ALL silver.
Update: this load chronographed a 10-shot average of 1243fps on 8/4/11.
Pictures of Silvertip:
I also tested one of my modified 200gr XTPs with awesome results. It was not fired into the tube, however, as my second wax tube that I had made was not yet hardened. I fired it into water as a preliminary test. A normal 200gr XTP posted the following results (both bullets were fired with the same hot load of 800-X): Max expansion .652", min expansion .582", retained mass 188.7gr. The modified XTP (I drilled a small hole to about twice the depth of the factory hollow point) posted these results: max expansion .928", min expansion .747", retained mass 200.2gr.
Not only did the modified XTP show MUCH greater expansion, it retained more mass, which was definitely surprising. I'm not sure about penetration yet, as that will have to wait for wax tube testing, but I'll do it soon. I'm also not really sure about the application of this bullet except as a self defense round. Although, a 180gr version would likely serve that purpose better. I was out of 180s so I'll try that soon. I also tried this with a 155gr XTP, but I was low on jugs and didn't find the core. The recovered jacket definitely showed extreme expansion, so I'll try it again.
Edited to include load data:
This load is OVER BOOK MAX, so please be careful, start lower, and work up slowly observing pressure signs. This load was as follows: Remington nickel brass, CCI 300 primers, 9.0gr of 800-X, Hornady 200gr XTP, COAL 1.260".
Update: this load chronographed a 10-shot average of 1124fps on 8/4/11.
Pictures (the first pic has a normal 200gr XTP on left, modified 200gr XTP center, and a 175gr Silvertip on right. The Silvertip gave me the idea for this, so I put it there to show the idea):