SavageT: Thanks for the link. Clearly current production S&B ammo is Boxer primer. I stated in my early post that I "believe" the posted velocity was 2670, I stand corrected. The webpage says it is 2625. Very sub-par for the .270 Winchester. This would be a good low-recoil round for sensitive shooters.
You sure have me going on the primers. I thought I had some great low cost brass when I bought the S&B ammo. In fact I ran out to my ammo box and have some of it before me right now. The box primary color is brown and white, with black letting. It clearly says Sellier & Bellot, Made in Czechoslovakia on it. Other information on it are the letters, NP 39.51, Neroxin anticorrosive-Antierosive. The Bullet No.: 2927, Type: 150 grs, 9,7 g. After firing 20 rounds I tried to deprime the case, because from the outside the primers appeared to be Boxer. But when I used a lite on the inside I could see two prime holes commonly see with BERDAN primers. Now if I made an error and tossed good cases I will be upset with my self.
Accuracy I'll stand by my statements regarding subpar velocity and poor accuracy. I do not regard 3" groups out of the glass bedded M700 rifle as good accuracy. When groups from this rifle average less then 2 inches and with some loads around a inch, 3" groups do not live up to expectation. Bullets with a history of living up to expectation are the Hornaday 150 Spire Pt., WW 150 grain Power Pt., Norma 150 grain boattail match, and 110 grain Serria.
On the day I tested the S&B ammo I also fired WW150, and the Hornaday 150, cleaning the barrel after each series. When I finshed the WW150 was my choice for that deer season, and it successful killed a Mule deer at better then 250. I was also dismayed at the low velocity produce by the Hornaday factory ammo. Accuracy was good.
I must admit that when I tried the WW150 in my M760 it was not a winner. I think I will change rifles when I fire the S&B .270 next time. It maybe more accurate in another barrel.
To bad we live on two different coast. I think we would enjoy poping some caps togather.