C182 PLT REQUIRED TO DEVIATE INTO MIL RESTR AREA DUE TO WX.

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RECEIVED PREFLT WX BRIEF FORECASTING CONVECTIVE ACTIVITY (TSTMS). FLYING ON PUBLISHED VICTOR AIRWAY (V394) FROM VEGAS DIRECT DAGGETT. TSTM BUILDUP APPROX 2 HRS PRIOR TO TIME FORECASTED IN BRIEF. LARGE CELL DEVELOPED DIRECTLY OVER DAGGETT OF SLIGHTLY NE OF. COULD NOT FLY THROUGH CELL; CAUSE LIGHTNING STRIKES AND HVY PRECIPITATION WITH SEVERE DOWNDRAFTS. WAS SAFETY OF FLT ISSUE. QUERIED ZLA AND JOSHUA APCH TO OVERFLY R-2502E OR R-2502N DUE TO TSTM (ALT WAS 8500 FT). THEY TOLD US 'NO; CAUSE LIVE FIRE ARTILLERY.' I AM 100% SURE (BEING AN ACTIVE DUTY MEMBER OF MIL) THAT THE MIL WAS NOT SHOOTING ARTILLERY. THEY INSTRUCTED ME TO TURN 10-15 DEGS L. I COULD NOT BECAUSE THAT WOULD PUT ME DIRECTLY IN HEART OF TSTM. I COMMUNICATED THIS. 4 OTHER ACFT (INCLUDING ACR B737) HAD EXACT SAME PROB AND ASKED CTR FOR SAME REQUEST. THEY CONTINUED TO DENY CAUSE ARTILLERY LIVE FIRE. SUGGESTION: AIRSPACE (RESTR) NEEDS 24 HR; 7 DAYS A WK POC FOR GRANTING PERMISSION IN SUCH OCCURRENCES. THIS WAS SAFETY OF FLT ISSUE. COULD NOT PROCEED S CAUSE MULTIPLE TSTM CELLS. TO THE N WAS CLR WITH LITTLE OR NO CUMULUS BUILDUP. IF THAT AIRSPACE IS REALLY THAT BURDENED BY ARTILLERY; SHOULD BE PROHIBITED NOT RESTR. ALSO; AT WHAT ALT DOES ARTILLERY ROUND ACHIEVE? AIRSPACE SHOULD BE MANAGED LIKE R-2515 (EDWARDS AFB) WHICH ALLOWS OVERFLTS ABOVE 6000 FT ON NO-USE HOURS (WEEKENDS). IN THE END; JOSHUA TOLD ME I FLEW THROUGH RESTR AIRSPACE. IF I DID; I DID NOT VIOLATE IT BY MORE THAN 1 MI OR 2 MI. POINT IS; I SHOULD NEVER HAVE BEEN HARASSED AND DENIED. APCH SHOULD HAVE HAD AUTH TO PERMIT REQUEST.