That is what we used to do with our .38 specials...Dumb Dumb bullets..Devastating on high desert jackrabbits..
Iím having some fun with this. The bit Iím using is a 1/8th Philips bit, is that a # 0, no idea? I started thinking if a cross stamp is good, what about two and getting more of a star pattern? For giggles, I made some up, it took a couple of slugs before I started getting it right as you can see from the picture. Do they shoot as accurate as the single cross stamp? I donít know, yet. It does look like the nose of the slug is more likely to get out of round, so perhaps accuracy is affected. Really thinking to use at closer ranges anyway, they might open faster on smaller less dense targets. That is the thought process behind it anyway. The other down side is that the petals will most likely separate/shear at higher fps, not a good thing, unless the immediate goal is for fast expansion.The real reason for doing this is because once I got started, just couldnít stop. The picture shows, the single stamped cross and the and also the double stamped slugs and as already mentioned you will see my learning curve. Included in the pic is the Philips bit Iím using. The end results to the slug hp seems to look like what Scott is getting, yet, uncertain.
First off not my idea, but taken from a few recent posts about low velocity slugs that mushroom easily. Thank you guys !!So ... taking a #2 Phillips screw driver tip then dressing each blade web with a dremel tool cut-off wheel, we get each web a tad thinner / sharper.* Took me 3 tries getting my grinding technique right & having control over equal thinning where it would contact the slugs hollow point making a uniform impression.Placing a NSA slug on a piece of flat and thick leather, gave three TAP TAP TAP's on the end of driver tip with a small tac hammer so the hollow cavity of slug took on this look.Once establishing how hard to strike was able to go threw a 375 count of NSA 20.2's in @ 45 minuets. Neurotic YES !!!AS TO TESTING .... O' yes they now POP open where before was not that impressed Shot from @ 20 yards into 1 gallon jug of water at @ 1040 fps a stock 20.2 HP passed right threw the jug exiting leaving a round hole ... had tried this prior with a few bottles in line to catch the slug. In the past recovered slug was only slightly opened at HP cavity and in no was mushrooming MODIFIED with an X from tool described and shown, slug enters jug and does this !!! POP peeling away to the depth of the HP cavity in a near perfect clover leaf shape. Started as a .22 caliber and opened up to a .380" clover having no measurable weight loss still weighing 20.2 grains.
Thanks for the clarification Scott. Looking on the interwebs, PH3: 0.141 inches, PH2: 0.086 inches, PH1: 0.071 inches, PH0: 0.055 inches, PH00: 0.048 inches. My little screwdriver set included two PH00 bits and apparently none of the PH0. The PH1 is slightly bigger, wonder what that will do regarding petal expansion, will they tear easier? The expansion you are getting with the smaller bit is amazing and the petals are staying intact. I don't typically have plastic milk jugs or pop bottles around to test with. I'll have to keep my eye out for some test targets so I can answer that question.