Most glarrying issue is the placement of the stock in his shoulder. Which suggests a scope bite is incoming. Also looks like one of the guns on the table is facing backwards, barrel away from the targets. Hard to tell.

I don't see a suitable backstop behind the targets, but maybe this whole setup is in a gravel pit or something, can'really say from the photo. All that shit on the tables should be behind the firing line, but that's more of a safety preference than a huge issue.

If we want to start nitpicking, his eyepro won't do any good on his forehead. Food/beverages should not be kept or consumed on the firing line due to lead contamination, and his stance will not adequately support the platform for follow-up shots.