Well, I tried to adjust number of rockets to 8+8 and rof to 8, and simultaneously I changed weapon size to 5 (as has the 240 mm rocket). Reloading is still fast, but Uragan causes about 50 percent more casualties and costs more. Since the casualties caused are however about the same level as US MLRS (though seem to be a little higher), it seems within a limitation of simulations. But as I have said, fast reloading remains the prolem even after adjusting weapon size to 5.
I was wondering why the BM-22 was included as an on-map unit, but the MLRS, the western counterpart, was not! After all, it has similar characteristics.
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'Qui desiderat pacem, bellum praeparat' - Flavius Vegetius Renatus (~400 AD), in the preface to 'De re militari'
It was in some oobs, but was removed to winSPMBT and for a good reason. I think it´s "unrealistic" to buy such units on-map for campaign cores and email battles. But guess they´re included for scenario creation.