Countryboy1150
Member
First off everything went smooth. My first time shooting rifle handloads.
Gun is a Howa 1500 270 bolt.
Here are the results and have a couple questions
1st string was factory Federal ammo I had for a while.All strings are 5 shot groups
2,956 ft/sec
2,949 ft/sec
2,892 ft/sec
2,956 ft/sec
2,892 ft/sec
AVG 2,929
ES:64
SD:33
2nd string started with handloads. Rem brass. Hornady 130 SP interlock bullets. CCI LRP. 50.5gr of IMR 4831.
2559
2588
2578
2564
2650
AVG:2587
ES:91
SD:36
3rd string. same as above except went to 51.0 charge
2614
2599
2599
2614
2604
AVG:2606
ES:15
SD:7
4th string@ 51.5gr
2656
2629
2635
2650
2629
AVG:2639
ES:27
SD:12
5th string@ 52.0gr
2656
2682
2666
2715
2666
AVG:2677
ES:59
SD:23
COAL length was 3.725 off ogive. At that length the bullet was .020 of lands. I seperated all bullets. They were within a 1.5 grains off each other. Best I could do trying to find 20 bullets that close together.
My question is where to go next ?
Hornady's powder range is 49.5-56.1
Lyman 49th suggest starting at 53.0. Max is 57.0 which is compressed
IMR reloading manual 55.8 max
I feel like I should get velocities up to where factory is. But then again it seemed like accuracy got worse as velocity increased. My first string of reloads at lowest velocity grouped as well at a 100yds as the factory did at 50 yds.
I also have a couple other powders I could try
I have A4350 and H1000. Although havent found much data for the 1000.
Any suggestions ?
Anybody else had good experiences with the 270 cartridge ?
Gun is a Howa 1500 270 bolt.
Here are the results and have a couple questions
1st string was factory Federal ammo I had for a while.All strings are 5 shot groups
2,956 ft/sec
2,949 ft/sec
2,892 ft/sec
2,956 ft/sec
2,892 ft/sec
AVG 2,929
ES:64
SD:33
2nd string started with handloads. Rem brass. Hornady 130 SP interlock bullets. CCI LRP. 50.5gr of IMR 4831.
2559
2588
2578
2564
2650
AVG:2587
ES:91
SD:36
3rd string. same as above except went to 51.0 charge
2614
2599
2599
2614
2604
AVG:2606
ES:15
SD:7
4th string@ 51.5gr
2656
2629
2635
2650
2629
AVG:2639
ES:27
SD:12
5th string@ 52.0gr
2656
2682
2666
2715
2666
AVG:2677
ES:59
SD:23
COAL length was 3.725 off ogive. At that length the bullet was .020 of lands. I seperated all bullets. They were within a 1.5 grains off each other. Best I could do trying to find 20 bullets that close together.
My question is where to go next ?
Hornady's powder range is 49.5-56.1
Lyman 49th suggest starting at 53.0. Max is 57.0 which is compressed
IMR reloading manual 55.8 max
I feel like I should get velocities up to where factory is. But then again it seemed like accuracy got worse as velocity increased. My first string of reloads at lowest velocity grouped as well at a 100yds as the factory did at 50 yds.
I also have a couple other powders I could try
I have A4350 and H1000. Although havent found much data for the 1000.
Any suggestions ?
Anybody else had good experiences with the 270 cartridge ?
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