A few more testing observations.
With the BD400 (conventional railed crossbow) , I didn’t get very good accuracy until I started using arrows with the extreme control of the AV3 vanes.
But, with the X1, the accuracy was even a little better with just the standard 1 degree offset of the very small Heat vanes. The enclosed rail’s advantages are hard to over emphasize.
A significant finding is that foc has such an effect on BC, which, in turn, has a major effect on trajectory. Traditionally, arrow drop charts show the drops from a horizontal launch (no upward vertical component at all). However, that is not how we sight in. We do have an upward component. The slower the launch, the greater this upward component is. The greater the upward component, the flatter the trajectory will seem.
Comparatively very high foc has a lot of advantages: greater accuracy, crosswind resistance, terminal performance, others(?). A huge, flat single blade broad head is historically very difficult to steer. However, when launched straight out of the SWAT’s barrel, the 375g large, flat bladed BH flew very accurately with virtually no vane control. FOC has to be the major factor.
In contrast, with the conventionally railed BD400, the broad head needed extreme guidance (AV3s ) to be accurate. Even AV 2s resulted quite inaccurate flight as did helical Blazers (both out of the BD).
These broad heads can very accurately be used out of either a conventionally railed or fully enclosed rail crossbow. Accuracy can be excellent, at least through 60 yards. The actual experienced trajectory is much flatter than many of us would imagine (at least me). You’re not going to bend this broad head!
Don’t pre-judge the usability of this BH like I did. I will have one X1 set up to hunt with the Edgetac 375 for this next year. This year’s bear likely won’t go far!