Keep in mind that mine are not large sample sizes and further testing at the same temperature, same primer could change the results. Comparing 250 TTSX and 250 Accubond it seems that, depending on the powder, the Accubond produced 15 to nearly 50 fps higher velocity with the same powder charge. I no problem with the TTSX matching Accubond velocity unless stuffing in a little extra powder becomes a barrier.
John Barsness wrote in Handloader 250 that, from his 9.3x62, he got 2636 fps with X-bullets and 62 gn Reloder 15 and 2651 fps with Accubond and 60.5 gn Varget.
One unerring mark of the love of the truth is not entertaining any proposition with greater assurance than the proofs it is built upon will warrant. John Locke, 1690
