If you would like to surprise your spouse or mom, a single way to get her ring measurement is to go into her jewelry box and "borrow" a single of her rings for a number of hours whilst you go to the jewellery retailer. At the shop, the sales man or woman can measure the ring so you will know the proper measurement to purchase synthetic opal rough. The338 is exact. At one hundred yards with a very good handload and rifle it generates groups of 1/four inch or more compact. There are a lot of other smaller calibers touted for their accuracy that are not able to beat this. Some international and domestic police departments use this caliber or the larger338 Lapua for sniperwork.
