Gentlemen
I finally took one of my rifles to the range. It is a CZ 527 in a HS Precision stock. This is the first time I have fired this gun, so it is brand new (I have had it for several years).
Particulars
Bluebird skies, 63 degrees F, side wind (from the left) about 10 mph
All shots at 100 yards
.223 Remington
Sierra 40 grain Blitzking bullets (coated with WS2)
Winchester 748 powder
Winchester brass, neck turned, primer pockets reworked, flash holes deburred, necks annealed
Murom primers
Bullets seated .015 off the lands
Source of loading data - Nosler
This is a pressure series and was shot in the order numbered. #1 is Nosler starting load. #5 is Nosler max load.
No velocities were measured (yet).
Much to my astonishment, the maximum load delivered the best accuracy with the group measuring .502 CTC.
I have loaded the next series with the #5 max powder charge, seating the bullets out .005 for each increment. Five rounds per series with top load being .003 off the lands. Yes, I will be watching pressures. Not my first rodeo. Using coated bullets, the velocities will be low by as much as 150 fps, so pressures are usually not a concern. That being said, I will monitor them nonetheless.
Now, to return to the range and see if I can improve that group. Frankly, I am near certain that this rifle will shoot one hole groups.
I just need to find it's favorite food.
This is only the first. I have several rifles needing load development. I have unfulfillable expectations for my custom rifles. Some may actually deliver.
When load development for this one is complete, the .17 Remington is next. I have already shot a 1/4 inch group with the 17 using factory ammunition. I am excited about seeing what it can do with tailored handloads. I will need a calm day for the little fellow.
Bill.
I finally took one of my rifles to the range. It is a CZ 527 in a HS Precision stock. This is the first time I have fired this gun, so it is brand new (I have had it for several years).
Particulars
Bluebird skies, 63 degrees F, side wind (from the left) about 10 mph
All shots at 100 yards
.223 Remington
Sierra 40 grain Blitzking bullets (coated with WS2)
Winchester 748 powder
Winchester brass, neck turned, primer pockets reworked, flash holes deburred, necks annealed
Murom primers
Bullets seated .015 off the lands
Source of loading data - Nosler
This is a pressure series and was shot in the order numbered. #1 is Nosler starting load. #5 is Nosler max load.
No velocities were measured (yet).
Much to my astonishment, the maximum load delivered the best accuracy with the group measuring .502 CTC.
I have loaded the next series with the #5 max powder charge, seating the bullets out .005 for each increment. Five rounds per series with top load being .003 off the lands. Yes, I will be watching pressures. Not my first rodeo. Using coated bullets, the velocities will be low by as much as 150 fps, so pressures are usually not a concern. That being said, I will monitor them nonetheless.
Now, to return to the range and see if I can improve that group. Frankly, I am near certain that this rifle will shoot one hole groups.
I just need to find it's favorite food.
This is only the first. I have several rifles needing load development. I have unfulfillable expectations for my custom rifles. Some may actually deliver.
When load development for this one is complete, the .17 Remington is next. I have already shot a 1/4 inch group with the 17 using factory ammunition. I am excited about seeing what it can do with tailored handloads. I will need a calm day for the little fellow.
Bill.