In the next day or so I will be posting an article on the penetration rates & other data. I emailed Woodleigh & I was totally surprised to actually get a very quick response. I have also spoken with Geoff McDonald from Woodleigh & he is going to provide me with photos etc. If you wish to contribute now with data I and I suspect other members & readers would be grateful. The reason I'm so interested is that I have had some very good & very bad results from using the right or wrong bullet. I don't want to have problems when I go hunting Oz buffalo in June & I really hate having to shoot an animal more than once. Here's a copy of the email from Woodleigh. Hi Dr Ray, We have shot a considerable number of game with the hydro solids during field testing, and it is continuing of course. Initially water buffalo with 375 H&H x 300 gr , also 416 Rem x 400 gr, 450 Ackley x 480 gr, 5oo Nitro x 570 gr, 338 Win and 338/06 x 225 gr. The 375 cal and above delivered full body penetration, length wise on mature bulls. We have also shot 7 or more elephant bulls. Side brain shots exited, one frontal brain shot and we dissected the head. The brain box had a 2” exit hole, the bullet was found in the pelvic area. We also performed penetration shots on some of the elephants on the ground, 500 N delivered 6’ of penetration, even when bone was struck. Soft tissue damage was considerable. We have shot giraffe, camel, wild cattle, donkeys, pigs, and deer. The performance on soft skinned animals is similar to soft nose bullets, but with a much longer wound channel. We also deliberately shot deer and donkeys through scrub to test for deflection and the bullets went right on through and did the job. The most important consideration when shooting animals in a herd, is hitting another animal behind the intended victim. You should have excellent results with the Federal Hydro loads, provided the shot is aimed at the vitals. This is critical with all bullets of course. We are always interested in feed back. Regards, Geoff McDonald Woodleigh Bullets PS Geoff advised me that the hydros do NOT have an upper limit in velocity – a very important point and I understand Woodleigh is holding discussions next week with Federal. So members and readers here’s your invitation to provide feedback to Woodleigh.