Wondering if someone out there could give me some information on these two. Also have been looking for Darryl Cassel does anyone know what ever happened to Darryl? Putting together a new elk rifle and have narrowed it down to these two.36" barrel shooting only the 300 smk. I know Darryl was getting around 3310 fps with his 338-416, iam thinking the 338 Excalibur would be very close with no fire-forming. My numbers show 3270 Excalibur, and 3188 for the 338-378 weatherby, compared to Darryl 3310fps 338-416. Can someone give me more information on the 338 Excalibur? Thank you