willienels
Member
I need some advice about cratered primers and pressure. Am developing a load for a Weatherby Vanguard .270 Win using Hornady V-max 110 gr, IMR4831, CCI 200 standard LR primers, and once-fired/partially FL sized RP cases. Shot yesterday one each 58 gr, 59 gr, 60 gr. The 58 gr showed no external evidence of excess pressure. The 59 gr showed only a tiny bit of primer cratering, no flattening, no resistance to bolt lift. The 60 gr showed a little more cratering, but otherwise was same as 59. The cratering in both cases can be felt when dragging a pointed awl across the ridge.
My policy has always been to stop short of any cratering, but in this case most of my data sources list 60 gr as max. Also, all my sources used standard LR primers as opposed to magnum LR.
Any advice about how to proceed will be appreciated.
Bill
My policy has always been to stop short of any cratering, but in this case most of my data sources list 60 gr as max. Also, all my sources used standard LR primers as opposed to magnum LR.
Any advice about how to proceed will be appreciated.
Bill