Greetings from a new member and bullets ?'s

[Greywuuf]

Hello all, interesting and informative sight. Let me start with a bit of Background and then some questions for you all.
First I have played with the 300 whisper in a 10" contender some for a couple of years, secondly I will be building an upper for an AR as the money and parts come in. I am an amature gunsmith ( still studying and.. so not taking in "off the street" work) and semi accomplished bulletsmith. I have been making ULD/VLD style .308 bullets that I have used in my .300 Winnie for a couple of years and have played with many differant weight/length combo's and several differant core materials ( lead, Tungsten, Nylon, and copper multi jackets and steel cup/inserts)
I have on order the needed dies to add a Rebated Boattail to my ULD bullet and was wondering if any of you had experience with this type of bullet . For those of you wondering what in the heck I am talking about it is like the boat tail used by Lapua in I beleive the Sencar line. I beleive that in a subsonic aplication there would be many benefits. I am trying to get permision to post an article outlining some of them. Until then any info you wish to share or questions you would like to ask me would be welcomed. I plan to do some rather exhaustive chrony/ accuracy test and post my findings here if anyone is interested. Also I beleive that I can change a bullets stability and sensitivity to twist rates to some extent by varying the center of balance by using lighter or heavier core material, have any of you had trouble with or succes with the heavier bullets, and are any or them close but not quite ? I am hoping to be able to make about 240 grains that reliably stabize with the RBT I think it will be worthwhile and hopefully the info will be usefull to some of you.

To much winter on my hands
Dan in Alaska