Looks like my post got hijacked a bit. Good info but kinda off track of my question.
Back to the original question.
David Minshall said:
I suspect there may be an element of this, although so far as I know the top LR shooters at last years World Championships mostly (if not all) used PP bullets. If there was an advantage to be had from GG bullets in the LR ML rifles then I am sure more of these top riflemen would be using them.
David
I think it would make a great article for your website why top LRML shooters use paper patch over grease groove and any actuall testing they did to arrive at that decision. Alot of people will use what someone tells you they use and it may work very well. It doesn't necessarily mean they did any testing to see why it works better than something else.
The paper for PP bullets isn't that easy to find. The Eaton 9lb airmail paper mentioned in all the PP articles no longer exists. I have all the big office supply stores out by me and none of them have Onion skin paper. I don't see it on their websites either. Buffalo Arms and J Cunard have supplies of 100% cotton they stocked up on but when it's gone that's it. The 25% Fidelity I found at only 2 places on the internet and one wants $16 a ream. Add your shipping and it's not that cheap. What happens if Fidelity changes their formula or drops the product altogether? That's a negative for the PP bullets in my opinion. What did Richard Corbin say in his article "Get a lifetime supply of it." Well, how much is that?
There's only one PP bullet mold for ML out there that I can find from J Cunard for $200. If you want to get the equipment to swage them from RCE, you need $700 ($300 for dies, $300 for a press & $100 for a core mold) You can't use your reloading press for 500+ gr bullets. That's alot of an investment to find out if they really shoot better or if there's no difference and it's just a traditional thing.
The bullets out there for sale aren't even the correct size. The main PP article
http://www.iastate.edu/%7Ecodi/PPB/PPB.html mentions you need .443 bullets. The ones sold by Montana Precision Swaging, Buffalo Arms are .440. That requires 3 wraps of paper not 2 like the article mentions.
I'm not saying I wouldn't use them but I'd just like to hear why I should other than some of the top guys use them. That's why I posed the original question of why the top guys use them.
Thanks!!