I managed to have a 3 day weekend so I took full advantage of it all three days. Starting off Friday morning I took my 40x with the 1:8.25 twist barrel out with the 103 Spencer's and setup at 500 yards with two promising loads to decide what to shoot.
This first group is 35.8 grains of H4350 there are only four shots here as I forgot to put a primer in the fifth one.
According to on target this group measures .639 CTC with only .472 vertical and .556 horizontal
Next is 36.0 grains of H4350 this to is at 500 yards
This group measures 1.431 CTC with a vertical of 1.279 and horizontal of 1.064
Needless to say the 35.8 grains is the load in this rifle.
Now onto my new barrel the one I'm known for. It's a 22 Dasher, Saturday I screwed on my old worn out record setting barrel and fire formed 50 cases and then neck turned them. That evening I began playing with loads and it looked like at 100 yards I was going to be around the 35.8 grain mark as well with a 80 grain Sierra MK moly coated. So once I established a baseline load I loaded up rounds starting at .020 off the lands and moved towards the lands in .005 increments until I was .010 into them. This morning (Sunday) I was up at 5am and at the range and setup at 5:30 and began testing. I decided this go around I wanted to do my initial testing at 300 yards instead of the usual 500. I'm only posting the best load of this test as from there going towards the lands the groups gradually got worse. So here's my test group at 300 using 35.8 grains of H4350 this is also .020 off the lands.
This morning it started out a bit cool the temps were 60 deg at testing.
So now I settled on a seating depth it was time to work on the powder charge.
While I was testing at 300 I had a few rounds that needed the second firing to fully form the cases so I moved over and sighted in at 500 and got a good zero.
This evening since I was already sighted for 500 I decided to to run my test for powder charge at 500 as well. The loads started at 35.6, 35.8, 36.0 and 36.2 grains of H4350.
Here are the results at 500 yards of the best group shot. This is 35.8 grains the exact same load tested at 300 with same seating depth as well.
OnTarget actually has the group a .701 with vertical of .494 and horizontal of .668
I'm pleased with the results and won't do any further testing as with the 22 Dasher your lucky to get 800 rounds fired before the barrel is trashed. There's enough consistency for me to be confident enough between testing seating depth this morning to testing powder charge this afternoon with a 30* temperature spread to say that's good enough for me.
Some may say that's not enough testing, but I've shot this caliber long enough to know where to start and stop and what works and doesn't work.
In all reality if one gets a good 22 barrel and gets a good tune the 22 Dasher will win and outshoot the 6 Dasher in nearly most instances. Mostly because the BC of the 80 grain bullet and being able to push it much faster over the 6 Dasher. For example. I was 3 minutes flatter at 500 yards with the 22 Dasher than I am shooting my 6 Dasher. The down side to really consistent accuracy are in the bullets. With the 22's we are stuck with factory mass produced bullets where the 6mm it seems everyone is making a great handmade custom bullet. If there were the same done for the 22's you would see more on the lines and more winning.
Anyhow I'm closing for now comments are welcomed and if you have any questions please ask.
This first group is 35.8 grains of H4350 there are only four shots here as I forgot to put a primer in the fifth one.
According to on target this group measures .639 CTC with only .472 vertical and .556 horizontal
Next is 36.0 grains of H4350 this to is at 500 yards
This group measures 1.431 CTC with a vertical of 1.279 and horizontal of 1.064
Needless to say the 35.8 grains is the load in this rifle.
Now onto my new barrel the one I'm known for. It's a 22 Dasher, Saturday I screwed on my old worn out record setting barrel and fire formed 50 cases and then neck turned them. That evening I began playing with loads and it looked like at 100 yards I was going to be around the 35.8 grain mark as well with a 80 grain Sierra MK moly coated. So once I established a baseline load I loaded up rounds starting at .020 off the lands and moved towards the lands in .005 increments until I was .010 into them. This morning (Sunday) I was up at 5am and at the range and setup at 5:30 and began testing. I decided this go around I wanted to do my initial testing at 300 yards instead of the usual 500. I'm only posting the best load of this test as from there going towards the lands the groups gradually got worse. So here's my test group at 300 using 35.8 grains of H4350 this is also .020 off the lands.
This morning it started out a bit cool the temps were 60 deg at testing.
So now I settled on a seating depth it was time to work on the powder charge.
While I was testing at 300 I had a few rounds that needed the second firing to fully form the cases so I moved over and sighted in at 500 and got a good zero.
This evening since I was already sighted for 500 I decided to to run my test for powder charge at 500 as well. The loads started at 35.6, 35.8, 36.0 and 36.2 grains of H4350.
Here are the results at 500 yards of the best group shot. This is 35.8 grains the exact same load tested at 300 with same seating depth as well.
OnTarget actually has the group a .701 with vertical of .494 and horizontal of .668
I'm pleased with the results and won't do any further testing as with the 22 Dasher your lucky to get 800 rounds fired before the barrel is trashed. There's enough consistency for me to be confident enough between testing seating depth this morning to testing powder charge this afternoon with a 30* temperature spread to say that's good enough for me.
Some may say that's not enough testing, but I've shot this caliber long enough to know where to start and stop and what works and doesn't work.
In all reality if one gets a good 22 barrel and gets a good tune the 22 Dasher will win and outshoot the 6 Dasher in nearly most instances. Mostly because the BC of the 80 grain bullet and being able to push it much faster over the 6 Dasher. For example. I was 3 minutes flatter at 500 yards with the 22 Dasher than I am shooting my 6 Dasher. The down side to really consistent accuracy are in the bullets. With the 22's we are stuck with factory mass produced bullets where the 6mm it seems everyone is making a great handmade custom bullet. If there were the same done for the 22's you would see more on the lines and more winning.
Anyhow I'm closing for now comments are welcomed and if you have any questions please ask.
