Any of the AimShot 223 laser bore sights will work with any of the AimShot rifle caliber arbors. We usually recommend the MBS (Modular Bore Sight) versions as they will include the external AAA battery pack which is what we recommend for best usage (20+ hours of laser output vs 15-20 minutes with the tiny internal batteries). The MBS223 is our normal recommendation, but for sure the BS223-20x (brighter laser compared to the standard BS223) will work with the arbors. You can always add the external battery pack at a future time (MBP223 Modular Battery Pack, compatible with all 223 lasers except the green laser).
The 300 Savage can be bore sighted easily using the AR3006 arbor and one of the AimShot 223 lasers.
If you want to bore sight pistol calibers and rifle calibers you would need two systems. The pistol calibers normally use the 30 carbine laser bore sight and then have the arbors (the sleeve) that fits over the laser for bore sighting. The rifle calibers utilize the same laser/arbor system but the base laser is the 223.
So in order to bore sight the calibers you mention, you would need the 30 carbine laser bore sight (MBS30), and the AR40SW and AR45ACP. For the rifle/shotgun you would need the MBS223 laser bore sight and then the AR3006 (for the 270) and the AR20GA for the shotgun.
The advantage of the AimShot laser bore sight system is once you have the base laser, any additional calibers you only need to purchase a new arbor for fitment. We are able to concentrate on accuracy into a single base laser, and the other calibers are less expensive to add on.
It would depend more on what chamber you are using. The arbors are specific to each chamber. So if your chamber is a 270 Winchester, you would want to use the AR3006 arbor in conjunction with one of the AimShot 223 laser bore sights (we recommend the MBS223).
If you have something like a 270 Weatherby, then you would need to use the ARWEA arbor that fits many of the Weatherby chambers (270, 300, 7mm, 340). There is an arbor cross reference chart on the AimShot website if you have fitment questions.
All of the AimShot laser bore sights and arbors are made to our specifications in Taiwan. All design, packaging and marketing is direct from us in Georgia.
You will need the model AR264Win for the 300 Winchester Magnum caliber.
For .357 magnum, you would need this boresight: https://www.opticsplanet.com/aimshot-universla-laser-boresights-without-arbors.html?_iv_caliber-193146313=0-dot-3 along with this arbor: https://www.opticsplanet.com/aimshot-universal-arbors-for-laser-boresights.html?_iv_caliber-193146313=dot-357-ar38