ips & PhilR,
I was unfortunate enough to own an early DT10 , the problems that I had were , Doubling , jumping open after first shot ( new locking bolt at less than 3 months old ) but the last straw was upon firing , barrels moved forward from breech block due to poor / lack of soldering to the barrels to monobloc , the same weekend mine happened a friend had an identical failure at another ground , both guns were hurredly recalled by GMK and replaced , mine was immediately sold (at a loss ) my friend also sold his and was not compensated for his custom fitted stock , so both of us had large financial losses , I then heard of many dissastisfied DT10 owners , but subsequently I do believe Beretta pulled their finger out and improved the quality and the model , enough for many DT11 owners to sell up and revert to DT10's .
With regard to Trap Guns there is only one really reliable brand !