Having been very happy with sierra 80g sp boat-tailed heads in my .243 loaded with 38.5 grains of H380 I have unfortunatly run out of the heads and the nearest I managed to pick up was sierra 85g spitzers.
I cannot find any load data for the 85g heads with H380 and dont want to go out and drop extra cash on more powder.
I have found the load data for 80g and 90g using H380 have a starting load of the same but it offers nothing on 85g spitzers, only data for 85g Barnes x heads which the starting load is 40 grains against 38 grains on both 80g and 90g heads.
My head tells me to start with the same weight as 80/90g but I am just caustious that because no data is available there is a reason why.
Experts advise please.