The first two Sika I ever killed I used a Sako Hunter in 7mm-08 handloaded with the Nosler 140 BT and pushed with IMR4350 . Later I Killed one with a bow , then another with a Knight 50 cal Disc Rifle (muzzleloader) and then that same year I killed another with a 260 REM . After that I killed one with a Savage 12 gauge Model 210 rifled bolt action slug gun and the Winchester Partition Gold slug . Killed another with a Savage 10ML 50 cal muzzleloader shooting a Hornady 250 SST sabot bullet then that same year I killed two more with a Savage 220 20 gauge bolt action rifled slug gun shooting the Remington AccuTip sabots .
While I don't think a 12 gauge rifled slug gun is really necessary the area I was hunting didn't allow rifles , same when I used the 20 gauge . The ones killed with muzzle loaders were killed during muzzle loader season .
At the present my Sika arsenal consists of the same Knight 50 cal as well as a 45 cal for the ML season , for private land that rifles are okay my Remington 700 in 6.5-06 will be fine . On the refuge during gun season the Savage 220 20 gauge rifled bolt action slug gun will be fine . The only thing I would like to add would be a decent Barnett crossbow for the archery season .