A simple decapping pin removes the spent primer while a special tool is needed for the Berdan. For reloading purposes there is no contest the Boxer wins hands down. Ironically the Berdan was invented by an American while an Englishman invented the Boxer type. The American makers who produce aluminum cases use the Berdan to prevent reloading them. Some foreign military rounds employ the Berdan, which reduces the cost. The difference is the Berdan has the anvil in the case while the anvil is in the Boxer primer. There are two types of primers in use today the Berdan and Boxer. With a max load, a primer change may cause it to be too warm so you might want to reduce the powder charge a grain or two if a brand of primers is changed. With normal loads under most circumstances, the change will be minor. If you have a good load worked up and change primer brands the characteristics of the ammo may be changed. When you assemble ammo, there are a lot of items that factor in the performance of the ammo. At one time, they made small pistol primers for the 30-30 but they evidently didn’t work out well due to under ignition of the powder and were discontinued. If you encounter cases with different size primers be sure to separate and use correct load for each size. However, the prudent reloader should be aware of this situation. Such situations are a pain in the keister. I have also seen 400 Cor-Bon ammo with both size primers. The powder can be over ignited causing a dangerous pressure spike. Under no circumstances, use them for smokeless powder ammo as that will almost certainly result in disaster. The 5 in 1 cases closely resemble the 445 super mag so if you have one avoid the Starline cases. Starline makes 45 Colt and 5 in 1 cases especially for blanks and the heads are marked as such. They are not Starline cases, as I have never had that or any other problem with that brand. I am in contact with the maker to see what they can do to fix it. Usually they are old cases but I recently ran into a brand of cases that has that problem. That causes frustrating delays in loading ammo. In some situations, they will pull out the decapping pin from the rest of the assembly. One irritating situation I encounter occasionally is undersized flash holes. I had a few and used them for blanks because of better ignition. You will probably never encounter these cases but if you do make sure you reduce your load especially if it is a hot one. Many years ago, the 38 and 357 mag cases had large pistol primers but someone realized that a small pistol primers would work just fine. Small Pistol Primer and Large Pistol Primer Ballistics Data ![]() Otherwise, you could go over the top with the new load. If you are using a max load and change any component, you should drop down about 5% or so to evaluate the new load. It goes to show you that any change in components will change the end results. You can also see that there is a difference between a 3” and 5” barrel and different guns with the same barrel length. ![]() Felt recoil was different with some of the loads that read 100 FPS difference or so. That is because the large pistol primer has a stronger ignition on the powder charge. It’s conclusive that large primers give more velocity with all powders tested especially the slower ones such as Herco. ![]() I have found that Federal and Fiocchi are using small pistol primers in their ammo. Why? Who knows? Anyway, it is something we have to deal with so I am doing testing on small VS larger through the chronograph. Recently some companies started making cases with small pistol primers for the 45 ACP. Small Pistol Primers vs Large Pistol Primers
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |