Re: Starting loads for 300 ultra and retumbo
Hi this is the Published data by ADI that devolped Retumbo especialy for the 300 RUM i shoot with one of the balastitions that works at ADI the data is as follows.
ADI AR2225 (Retumbo)
300 Remington Ultra Mag
Start, Vel, Pres, Max, Vel, Pres
90.0gr 3069fps, 56500psi, 96.0gr, 3204fps, 62500psi
81.0gr 2852fps, 56200psi, 86.0gr, 2988fps, 62800psi
84.0gr 2800fps, 56600psi, 89.0gr, 2905fps, 61900fps.
all data in a 24" test barrel
Hope it helps