If you are talking true IPSC, you wouldn't be worried about how tight of a group at 10m at "IPSC speed" (which I quantify as 0.2-0.25 second splits) but only worried about getting both in the A zone.
Just work on building speed while maintaining acceptable accuracy. Acceptable accuracy is defined by you. For me, when shooting at speed, it's an 8 inch circle. For some, it might 1" but these people will never shoot fast. Now I'm not saying accuracy and speed are mutually exclusive but I'm saying of all the shooters I know, some are like me and would rather get 5 shots into an 8" circle in 1.5 seconds; while others will always take their time, never push their speed, but shoot tighter groups.
Stick the target at 10m, and if you currently shoot 1 shot every 4 seconds, try for 1 every 3 seconds, 1 every 2.5 seconds, etc etc. Buy a shot timer as I feel this is critical to pushing yourself. And I would say do it until you're satisfied but really you should never be happy with your skill and always want to go faster/more accurate.