Hi all,
This is my first post. Forgive the long post right out of the gate. Trying to include all pertinent info.
I'm trying to work up a completely new load. I'm shooting a 300 wsm, just a plain stock Remington 700. I'm using new ADG brass, 175 Barnes LRX bullets, Ramshot Hunter powder, and CCI #34 primers. Rounds are loaded to 2.175 CBTO to make them fit my magazine. That's close to 100 thousands jump.
I went out about 2 weeks ago to try to find pressure signs or where my max charge would be. I stuck with Barnes loading data and tested 1 round at half grain increments from 65-72.5 grains. I never saw pressure signs, but felt the bolt lift a litter heavier beyond 71.5 grains. I was using a magnetospeed sporter chronograph to try and narrow in on a velocity node as well. Here's the data from my first test:
65-2775
65.5- 2828
66-2877
66.5-2899
67-2919
67.5-2980
68-2978
68.5-2987
69-2996
69.5- 3029
70-3065
70.5- 3062
71- 3077
71.5- 3105
72- 3120
72.5- 3167
I tested around 70 grains next. What I didn't factor in, and a major question I have is with temp sensitivity. It was about 55 degrees when I ran my first pressure signs / velocity test.
Next I tested 3 rounds each at the following, but the temperature was around 35-40 degrees.
70.4 - 3009, 3014, 3011
70.6 - 3011, 3023, 3032
70.8 - 3004, 3020, 3024
Today I tested 3 rounds each at the following, with temp close to 60 degrees
69.8- 3059, 3063, 3050
70- 3077, 3076, 3073
70.2- 3091, 3083, 3063
The temp sensitivity has got me stumped. I don't know what to do next.
Dumb question …Is a velocity node specific to a certain velocity? Meaning I will have to learn what the temp swing is and then load various rounds for what the given temp is on a particular day.
Any help would be appreciated.
This is my first post. Forgive the long post right out of the gate. Trying to include all pertinent info.
I'm trying to work up a completely new load. I'm shooting a 300 wsm, just a plain stock Remington 700. I'm using new ADG brass, 175 Barnes LRX bullets, Ramshot Hunter powder, and CCI #34 primers. Rounds are loaded to 2.175 CBTO to make them fit my magazine. That's close to 100 thousands jump.
I went out about 2 weeks ago to try to find pressure signs or where my max charge would be. I stuck with Barnes loading data and tested 1 round at half grain increments from 65-72.5 grains. I never saw pressure signs, but felt the bolt lift a litter heavier beyond 71.5 grains. I was using a magnetospeed sporter chronograph to try and narrow in on a velocity node as well. Here's the data from my first test:
65-2775
65.5- 2828
66-2877
66.5-2899
67-2919
67.5-2980
68-2978
68.5-2987
69-2996
69.5- 3029
70-3065
70.5- 3062
71- 3077
71.5- 3105
72- 3120
72.5- 3167
I tested around 70 grains next. What I didn't factor in, and a major question I have is with temp sensitivity. It was about 55 degrees when I ran my first pressure signs / velocity test.
Next I tested 3 rounds each at the following, but the temperature was around 35-40 degrees.
70.4 - 3009, 3014, 3011
70.6 - 3011, 3023, 3032
70.8 - 3004, 3020, 3024
Today I tested 3 rounds each at the following, with temp close to 60 degrees
69.8- 3059, 3063, 3050
70- 3077, 3076, 3073
70.2- 3091, 3083, 3063
The temp sensitivity has got me stumped. I don't know what to do next.
Dumb question …Is a velocity node specific to a certain velocity? Meaning I will have to learn what the temp swing is and then load various rounds for what the given temp is on a particular day.
Any help would be appreciated.