Finally have a GOOD chrono to corroborate QL estimates
Posted: 03 Apr 2013 08:36
For the better part of 2 years I would wait for the perfect day with optimum lighting conditions (which I experimented with quite a bit) and would trot out my Shooting Chrony Alpha only to be bewildered with readings that were off from the published data by as much as 500 fps (usually reading faster, but sometimes ridiculously slower. I stuck with it because the thing was a gift from a family member and I didn't want any hurt feelings over ditching it. Anyway enough is enough so recently I bought a different make, a ProChrono Digital from Competition Electronics. What a difference! This new one reads everything without any errors and everything I have ran over it, from 45/70 through 22lr and even my air gun in the back yard has been seemingly right on the money. Daylight conditions seem to not affect it and it is so easy to use, no codes to remember, stores lots of shots, strings etc and the best part, it doesn't all go away when you switch the unit off like the Shooting Chrony did. Anyway, a big for the ProChrony.
Now onto QuickLOAD. This is the first time I have actually been able to compare real chronographed numbers with what QL says it should be. These were just my 45/70 pop corn loads, using Unique and Trail Boss with a 350 gr Dardas. The QL estimations were quite close to the actual speeds. The Trail Boss QL estimation was 1060 fps, this with 13.8gr. Actual chrono was a hair faster at between 1065 and 1075 for a 5 shot string. The unique loads were about 40 fps slower than QL. Of course it was around 32 degrees F out and it is quite possible that Unique is affected by the cold more than Trail Boss but still all and all I had a lot of fun seeing my new toys working together as they should! I am now finally, after a year wasted trying to troubleshoot the Shooting Chrony going to start working up my 525gr Piledriver loads for this summer. I have "measured" a fired case with water weight, got the variables set as close as I can figure so all I need to do is get out to my reloading shed and get started, no easy feat with all the other projects I have but will get to it soon. As I get to using the new chrony more and seeing QL results and learning how to tweak it for more accurate results I predict QL is going to open doors in developing new loads where published data is scarce.
As a side note, when I loaded my "start loads" last year with the 525 gr my Shooting Chrony was reading near 1800fps! That velocity should have dislocated my shoulder had it been true!
Now onto QuickLOAD. This is the first time I have actually been able to compare real chronographed numbers with what QL says it should be. These were just my 45/70 pop corn loads, using Unique and Trail Boss with a 350 gr Dardas. The QL estimations were quite close to the actual speeds. The Trail Boss QL estimation was 1060 fps, this with 13.8gr. Actual chrono was a hair faster at between 1065 and 1075 for a 5 shot string. The unique loads were about 40 fps slower than QL. Of course it was around 32 degrees F out and it is quite possible that Unique is affected by the cold more than Trail Boss but still all and all I had a lot of fun seeing my new toys working together as they should! I am now finally, after a year wasted trying to troubleshoot the Shooting Chrony going to start working up my 525gr Piledriver loads for this summer. I have "measured" a fired case with water weight, got the variables set as close as I can figure so all I need to do is get out to my reloading shed and get started, no easy feat with all the other projects I have but will get to it soon. As I get to using the new chrony more and seeing QL results and learning how to tweak it for more accurate results I predict QL is going to open doors in developing new loads where published data is scarce.
As a side note, when I loaded my "start loads" last year with the 525 gr my Shooting Chrony was reading near 1800fps! That velocity should have dislocated my shoulder had it been true!