I fount this interesting today. I have a Persian Mauser. Plus I took some Iranian 8mm rounds that I disassembled then loaded up with the average charge from the pulled bullets of 45grains. OAL is nearly identical to the Iranian ammo with less crimp than the Iranian ammo. Zero signs of over pressure. I had previously ran sample loads of 40, 41,42 43 and then 45 grains looking for over pressure before I loaded up 20 rounds of the 45 grains.
So, with the Persian Mauser and the Persian bullets/powder loaded into PPU cases, the POI across 10 rounds was pretty decent I would say. Vertical was spot on at 50 yards and a tad left. Groupings were as good as it gets with me, my eyes and bags at 50Yards with one flyer.
I then ran 6 rounds with my German K98K and the POI was high about 4" at 50 yards.
Next was PPU 196g and it was about 3" low at 50yards
This got me thinking about matching the load to the gun. When I ran the Original Iranian Ammo, everything was left and nearly center vertical but groups were bigger. The Iranian ammo primers are known to delay and I attributed the grouping to such. Seems like the powder, bullet and sights for the Persian mauser all matched to give the proper POI (or close to it, I have not shot at 100 yards yet).
Got me thinking if there were some known rules about vertical POI and powder, bullet weight, barrel length etc.
The Persian Mauser is a longer barrel and a bit heavier than the German K98K. I'm speculating that is a factor in why the K9K posted higher POI. But why the lower POI for the PPU? Less energy and thus less recoil? Faster powder burn?
Both bullets are about 196grain.
Iranian is a boat tail. And a really tapered rear and boat tail. Not as much area contacting the rifling compared to the PPU.
The PPU is a soft point non-boat tailed
YES, the targets are rotated and YES what you see is the proper vertical of the target when on the stand.
So, with the Persian Mauser and the Persian bullets/powder loaded into PPU cases, the POI across 10 rounds was pretty decent I would say. Vertical was spot on at 50 yards and a tad left. Groupings were as good as it gets with me, my eyes and bags at 50Yards with one flyer.
I then ran 6 rounds with my German K98K and the POI was high about 4" at 50 yards.
Next was PPU 196g and it was about 3" low at 50yards
This got me thinking about matching the load to the gun. When I ran the Original Iranian Ammo, everything was left and nearly center vertical but groups were bigger. The Iranian ammo primers are known to delay and I attributed the grouping to such. Seems like the powder, bullet and sights for the Persian mauser all matched to give the proper POI (or close to it, I have not shot at 100 yards yet).
Got me thinking if there were some known rules about vertical POI and powder, bullet weight, barrel length etc.
The Persian Mauser is a longer barrel and a bit heavier than the German K98K. I'm speculating that is a factor in why the K9K posted higher POI. But why the lower POI for the PPU? Less energy and thus less recoil? Faster powder burn?
Both bullets are about 196grain.
Iranian is a boat tail. And a really tapered rear and boat tail. Not as much area contacting the rifling compared to the PPU.
The PPU is a soft point non-boat tailed
YES, the targets are rotated and YES what you see is the proper vertical of the target when on the stand.