I have ben reloading for a while, and am familiar wth the common hunting bullets for the 270 Win (130 and 140 grain stuff)
However, I am interested in loadin up some 165 and possibly some 175 grain Matrix Bullets.
I have the nosler book with info on their 160 grain Partition, and could use that as a starting point. However, I am looking for some actual tested information frome someone who had used loads like this.
I have three powders in mind, H4831SC, H1000, and Retumbo.
The barrel is a 27", 9 twist.
At what point do I loose efficiency? I would like to squeak as much velocity as possible with these longer VLD bullets.
Also, does anyone other than Matrix make these heavier VLD bullets?? I dont mind giving the Canadians money, but if a US company made some, I would rather give them my business.
you could always try e-mailing them directly. I've done this for Berger bullets and they are more then happy to provide data. I assume you are knowledgeable about what your seating dimension is (that is OAL to ogive) in your gun, this , combined with using a chronograph helps stear you in the right direction.
I would also cross reference to other reloading data, such as Sierra or Nosler..
You may get better performance at longer distances (over 300 yds) then what you might find if testing at 100/200 yds due to bullet stabalization.
I have not used these bullets.