The straight-away target is the most missed target in trapshooting by every skill level.
Knowing the reasons why we miss this seemingly easy target presentation, can help with evaluating why you miss.
If the shot pattern tends to be delivered over the target. The shooter may be lifting their head / raising their eyes during the shot. Not taking their time to completely move the gun up into sight picture. Can also mean the guns POI is set too high. Only you can figure that out.
If the shot tends to be delivered under the target, again it could be a POI setting issue. Although most under shot straight targets are a result of jumping on the target too fast and out of normal gun control. The stopping gun movement, or short shot, is your subconscious realizing the trigger timing and visual target acquisition will deliver the shot too high and the stops your vertical movement. Nothing can be done about out of control movement at that point. Your control would have been needed from the start by taking the time to see the target properly before moving to it at your normal pace. Hope for chips.
Short shooting can also be a response related to not being visually ready to make the shot. The target surprises you and your subconscious, then you try to get make adjustments on the fly. Hope for chips. Most shooters will recognize this feeling and the next shot will be better timed because the shooter is aware. You see this all the time. A shooter loses a target and the next 3 or 4 are pefectly centered. Center until the shooter get complacent again and allows the mind to drift from the job at hand.
Heck.... if I never missed another straght-away, Id have a 99.8 average in singles. Don't feel bad about loosing these troublesome targets, your among an elite group....all of us.
Maltzie