A few test shots with prototype ACP .22 calibre pills
Posted: Wed May 21, 2014 3:04 pm
These pills are 45gr prototype ACP bullets for .22 centrefires. A few of them are in the field being tested for accuracy and also on-game performance and I was given some to test out but they are not for sale yet until the maker is satisfied with the results.
For those unfamiliar these are a monometal bullet and the nose is pre cut into three petals. The intent with these .22 pills is for the bullet to be soft enough to have good effect on small vermin thanks to the petals, but with a solid base to drive deep on heavier animals should they present themselves (pigs, etc).
I only have 2208 here at the moment, and while it will work in a .223 it's not ideal with lighter pills. Apparently you don't get top speeds out of it and the case is also full.
I decided to load an arbitrary load of 27gr of 2208 which is 1gr under the 28gr listed ADI maximum for 45gr pills. Cases are once fired Winchesters FLS and with standard CCI SR primers.
Despite 2208 not being the best light pill .223 powder, this load chronied at 10 feet wasn't dragging its heels...
Test bed is my Tikka T3 Laminate Stainless with a 4.5-14 Clearidge Ultra XP on top, on this highly sophisticated benchrest setup. (the Mrs doesn't know I had the cushion....)
I lasered out 100m and propped my target board up.
The rifle was cleaned this morning, so I had a baseline to start from.
First two foulers were over the chrony. Next one was at paper at about 50m to check POI as the rifle was set up with 55gr SBK's over 26gr of 2208. So I was happy to see this, and it meant without further mucking about I could get going at 100m.
I then fired off three shots with this result.
Next group of five after doping the scope a little left gave me this reasonable group.
The higher shot that's taken the group out a bit was the first from cold, so maybe that's why it's a tad off the others.
In any case, this is with no load development and with no seating depth adjustment - I have a good 1.5mm of breathing room in the T3 mag so the next lot I load will be seated further out. And loaded a half grain hotter. Primers appear to show mild pressure the barrel is as clean as a whistle actually.
Out of interest, there is zero visible sign of any copper fouling at the muzzle at this point. (macro pics make it look as rough as Fatboy's tractor, eh?)
Length comparison of 45gr ACP's with 55gr SBK's.
Next stage for me will be to head out in the coming evenings and see if I can whack some foxes and a few rabbits with these, to test them on flesh.
For those unfamiliar these are a monometal bullet and the nose is pre cut into three petals. The intent with these .22 pills is for the bullet to be soft enough to have good effect on small vermin thanks to the petals, but with a solid base to drive deep on heavier animals should they present themselves (pigs, etc).
I only have 2208 here at the moment, and while it will work in a .223 it's not ideal with lighter pills. Apparently you don't get top speeds out of it and the case is also full.
I decided to load an arbitrary load of 27gr of 2208 which is 1gr under the 28gr listed ADI maximum for 45gr pills. Cases are once fired Winchesters FLS and with standard CCI SR primers.
Despite 2208 not being the best light pill .223 powder, this load chronied at 10 feet wasn't dragging its heels...
Test bed is my Tikka T3 Laminate Stainless with a 4.5-14 Clearidge Ultra XP on top, on this highly sophisticated benchrest setup. (the Mrs doesn't know I had the cushion....)
I lasered out 100m and propped my target board up.
The rifle was cleaned this morning, so I had a baseline to start from.
First two foulers were over the chrony. Next one was at paper at about 50m to check POI as the rifle was set up with 55gr SBK's over 26gr of 2208. So I was happy to see this, and it meant without further mucking about I could get going at 100m.
I then fired off three shots with this result.
Next group of five after doping the scope a little left gave me this reasonable group.
The higher shot that's taken the group out a bit was the first from cold, so maybe that's why it's a tad off the others.
In any case, this is with no load development and with no seating depth adjustment - I have a good 1.5mm of breathing room in the T3 mag so the next lot I load will be seated further out. And loaded a half grain hotter. Primers appear to show mild pressure the barrel is as clean as a whistle actually.
Out of interest, there is zero visible sign of any copper fouling at the muzzle at this point. (macro pics make it look as rough as Fatboy's tractor, eh?)
Length comparison of 45gr ACP's with 55gr SBK's.
Next stage for me will be to head out in the coming evenings and see if I can whack some foxes and a few rabbits with these, to test them on flesh.