Anyone Shooting Hogdon Titegroup and AIMS bullets

[raks]

+1 This has been my experience too.

i took a quick look at his numbers and i think the problem is that he used FMJ loading data rather then lead loading date. since he is suing a plated bullet he should be looking at a lead load data. anytime i have compared lead to FMJ's the FMJ's need more powder for the same velocity per weight. my 2 cents worth.

 

[relliott]

Talked to him last night. He was indeed standing too close to the chrono. That corrected, everything "should" be fine now.

 

[WarrenD]

Hello Everyone,

I have a question I was hoping someone could shed some light on for me.

I was at the range yesterday using my Beta Chrony and I think I am getting some erroneous results. I have been firing the rounds about 2 to 4 inches above the sensors.

I am using Hogdon Titegroup power and loading with 4.7 grains, my bullets are the AIMS 185 gr 40 cal which end up being anywhere from 185 to 190gr in reality and my O.A.L is around 1.160.

The results I was getting were 1196 fps, which is way over the load data.

Does anyone think this is an expected result or is my Chrony screwed or I am not using it correctly?

Any suggestions would be greatly appreciated.

I am using an STI Edge. I am using the Lyman manual, but no data for 185 gr bullets and for Titegroup powder (strange).

I am trying to hit major at 180 power factor and was hoping to reduce the recoil, by dropping the powder, increase/decrease OAL, etc

I guess I am just trying to get a baseline to see what I am shooting now in my reloads and try to work backwards.

Whan was the last time you had your chrony calibrated? Have you ever shot one of the front rods? I was using the exact same formula as you with AIM 185s and TG 4.7 and an STI EDGE and found that I was getting abnormally high chrony readings. I compared to another chrony and found my readings more in line with what they should be (970-975) Then I decided to have my Chrony caibrated at Chrony here in Mississauga (which they do for free by the way) and found that as a result of having shot one of the front bars (last summer sometime!) the front sensor had been displaced aft a fraction. Of course this caused the sensor spacing to be reduced thus giving erroneously high velocity readings.
I would suggest you first check your sensors to see if there is any signs of movement, try someone else's chrony to get a comparison then if necessary, have yours calibrated. Then if you find that you are getting true readings, then of course all the other suggestions should be followed to reduce your velocity.
I think you have the formula correct, so good luck in finding the problem!