I own a 410E and shoot B&P loads since it's no big deal to order them on line and they are loaded to CIP standards. Their MB Classic and MB Extra have peak pressures of 550 and 690 bar, respectively, for 1 1/8 and 1 1/4 ounces of lead. To get pressure in psi multiply by 14.5. These loads are called something different on the B&P U.S. web site, I think Upland Game or Upland Game Classic. You can get pressure on the italien site.