Hello everybody!
I am new to this forum and this is also my very first post; I'm a happy owner of a Mod. 28-2 4" and soon will be owning a 500 SW Mag 6.5" barrel.
I would like to ask to those that are shooting this gun or other very powerful handguns in general two suggestions regarding reloading of this cartridge.
I am currently only used to reloading 10mm Auto, 45 ACP and 40 S&W. I only use Vihtavuori powders and I have a good amount of N105, that I was thinking about using it with the 500 SW.
1)
The first question is this: from the VV website there is a load indication for N105 and for the Speer 300gr TMJ ball. It appears that ball is conceived for the 50AE caliber and not the 500 SW Mag, and it does NOT have the cannellatures usually found on the 500SW ball. I am assuming that if VV is publishing this data, it will be 100% safe to use these bullets, but it is strange nevertheless. What are your opinions on this?
2)
The second question is related to my idea of making a light load for "recoil familiarization" purposes. The most powerful gun/round I have shot so far was out of a SW 29 4" barrel loaded with Sellier&Bellot .44 Magnum SP 240grs load. Looking at the specs on their website, it appears those are not really such powerful loads, they are listed @ 1280 ft/s out of a 4.5" inch barrel. That gun felt comfortable to shoot, quite snappy yes but I managed to get out a box of rounds out of it without any fatigue at all. Very fun to shoot.
Now, going from there to the 500, and reloading, I wanted to start by creating a very light load to get confidence on the recoil, and then work up. I wanted to start with the 300gr ball from Speer (that I can find easily here), but load with less than minimum charge. VV data states a minimum of 30.6 grains of N105 and max 36 grains. That's a 20% range from minimum.
I wanted to try reloading as a light-load around 24-25 grains of N105, keeping the same COL as indicated on the table.
Will this cause any serious problem such as unburned powder or squib load or even worse those sometimes-read-on-the-web explosions from low density charges?
I have calculated the "density" of powder compared to the available chamber space (COL – bullet length) for this option and compared it with the value obtained using VV minimum powder charge for 44 mag, 357 mag, 38 special, 45 acp, and it appears that even with such low loading, the density is roughly 10% less than the minimum suggested for 44 magnum / 357 magnum but anyway almost double than the minimum suggested for a 45 acp (in this case 45 acp using N350 powder, a little faster burning….).
Any open suggestion on the two above questions will be greatly appreciated. Thanks!!

Andy

I am new to this forum and this is also my very first post; I'm a happy owner of a Mod. 28-2 4" and soon will be owning a 500 SW Mag 6.5" barrel.
I would like to ask to those that are shooting this gun or other very powerful handguns in general two suggestions regarding reloading of this cartridge.
I am currently only used to reloading 10mm Auto, 45 ACP and 40 S&W. I only use Vihtavuori powders and I have a good amount of N105, that I was thinking about using it with the 500 SW.
1)
The first question is this: from the VV website there is a load indication for N105 and for the Speer 300gr TMJ ball. It appears that ball is conceived for the 50AE caliber and not the 500 SW Mag, and it does NOT have the cannellatures usually found on the 500SW ball. I am assuming that if VV is publishing this data, it will be 100% safe to use these bullets, but it is strange nevertheless. What are your opinions on this?
2)
The second question is related to my idea of making a light load for "recoil familiarization" purposes. The most powerful gun/round I have shot so far was out of a SW 29 4" barrel loaded with Sellier&Bellot .44 Magnum SP 240grs load. Looking at the specs on their website, it appears those are not really such powerful loads, they are listed @ 1280 ft/s out of a 4.5" inch barrel. That gun felt comfortable to shoot, quite snappy yes but I managed to get out a box of rounds out of it without any fatigue at all. Very fun to shoot.
Now, going from there to the 500, and reloading, I wanted to start by creating a very light load to get confidence on the recoil, and then work up. I wanted to start with the 300gr ball from Speer (that I can find easily here), but load with less than minimum charge. VV data states a minimum of 30.6 grains of N105 and max 36 grains. That's a 20% range from minimum.
I wanted to try reloading as a light-load around 24-25 grains of N105, keeping the same COL as indicated on the table.
Will this cause any serious problem such as unburned powder or squib load or even worse those sometimes-read-on-the-web explosions from low density charges?
I have calculated the "density" of powder compared to the available chamber space (COL – bullet length) for this option and compared it with the value obtained using VV minimum powder charge for 44 mag, 357 mag, 38 special, 45 acp, and it appears that even with such low loading, the density is roughly 10% less than the minimum suggested for 44 magnum / 357 magnum but anyway almost double than the minimum suggested for a 45 acp (in this case 45 acp using N350 powder, a little faster burning….).
Any open suggestion on the two above questions will be greatly appreciated. Thanks!!

Andy