Alright, Wizards.. Got a question for you.
I'm pretty new to the reloading game and I'm not sure what what to make of these last two trips to the range. I'm currently working up a load for my 30.06 with 180gr Accubonds using IMR4350 using velocity to find a node with good ES and SD, then I'll move my OACL around to find accuracy. Basically, I worked up in .3 increments from 54.4 to 57.1 and found a few sweet spots, decided to play around in the 56.2-56.8 range and went out for another trip. What I'm not understanding was after the second trip, my velocities are consistently 50fps faster today than they were a few weeks ago. Not only were these last numbers higher, but they're also 60fps over the numbers in the Nosler book and their test barrel was longer. I'm not seeing any pressure signs until I've gotten over 56.8 which is why that was my max number on this trip.
I'm not really sure how I should interpret these results. My test consisted of 4 4-shot groups in .2 increments. The 56.2/56.4 loads were pretty on par with the speeds I saw a couple weeks ago. It was the 56.6/56.8 that had a pretty large jump from the first test. I know that velocity can be a sign of pressure but these loads were just fine the first time around. I plan on sticking with the 56.6 and playing around with length to find a group with it, unless that's not a good idea. I know 56.5 is a very common charge with this caliber/weight combo. I don't know if pushing the bullets into the case more is going to raise my velocity even higher or not.
Tikka T3 30.06
180gr Nosler Accubond
IMR4350
Fed 210 Winchester brass
2.729 to Ogive with 3.357 OACL which is about .020 off lands.
Magnetospeed Sporter chrono
I'm pretty new to the reloading game and I'm not sure what what to make of these last two trips to the range. I'm currently working up a load for my 30.06 with 180gr Accubonds using IMR4350 using velocity to find a node with good ES and SD, then I'll move my OACL around to find accuracy. Basically, I worked up in .3 increments from 54.4 to 57.1 and found a few sweet spots, decided to play around in the 56.2-56.8 range and went out for another trip. What I'm not understanding was after the second trip, my velocities are consistently 50fps faster today than they were a few weeks ago. Not only were these last numbers higher, but they're also 60fps over the numbers in the Nosler book and their test barrel was longer. I'm not seeing any pressure signs until I've gotten over 56.8 which is why that was my max number on this trip.
I'm not really sure how I should interpret these results. My test consisted of 4 4-shot groups in .2 increments. The 56.2/56.4 loads were pretty on par with the speeds I saw a couple weeks ago. It was the 56.6/56.8 that had a pretty large jump from the first test. I know that velocity can be a sign of pressure but these loads were just fine the first time around. I plan on sticking with the 56.6 and playing around with length to find a group with it, unless that's not a good idea. I know 56.5 is a very common charge with this caliber/weight combo. I don't know if pushing the bullets into the case more is going to raise my velocity even higher or not.
Tikka T3 30.06
180gr Nosler Accubond
IMR4350
Fed 210 Winchester brass
2.729 to Ogive with 3.357 OACL which is about .020 off lands.
Magnetospeed Sporter chrono