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flintlock.50 · June 5, 2011, 03:06 PM

I've had a Pro Chrono Digital by Competition Electronics for a couple of years. I get good repeatability on my loads, but they I can't seem to match what the books say or what other folks post for their loads. For example:

.30-06
Rem 700 (22 inch barrel)
165 gr Hornady SSTs
58.0 gr of IMR 4350
Nosler cases
CCI large rifle primers
average MV 2771 fps (10 ft from chrono)

Nosler Accubonds in the same load and cases average 2749 fps

I got 2863 fps in another batch of Nosler cases but they were 20 grains heavier than my current batch so their case capacity was considerably smaller. They never showed signs of over pressure, but I only got 3-4 shots from them before they started showing signs of incipient case head separation.

So here's my dilemma.

I have a Leupold VX III scope with the CDS dials. I'm about to order a dial for my 165 grain load. However, if my MV is off the dial won't be correct. What is typical for 58 grains of IMR4350 behind a 165 grain bullet? Are my numbers credible?

June 5, 2011, 03:06 PM	#1
flintlock.50 Senior Member Join Date: July 1, 2009 Posts: 233	chronograph accuracy I've had a Pro Chrono Digital by Competition Electronics for a couple of years. I get good repeatability on my loads, but they I can't seem to match what the books say or what other folks post for their loads. For example: .30-06 Rem 700 (22 inch barrel) 165 gr Hornady SSTs 58.0 gr of IMR 4350 Nosler cases CCI large rifle primers average MV 2771 fps (10 ft from chrono) Nosler Accubonds in the same load and cases average 2749 fps I got 2863 fps in another batch of Nosler cases but they were 20 grains heavier than my current batch so their case capacity was considerably smaller. They never showed signs of over pressure, but I only got 3-4 shots from them before they started showing signs of incipient case head separation. So here's my dilemma. I have a Leupold VX III scope with the CDS dials. I'm about to order a dial for my 165 grain load. However, if my MV is off the dial won't be correct. What is typical for 58 grains of IMR4350 behind a 165 grain bullet? Are my numbers credible?