Quote:
Originally Posted by elkhunter11
I agree, with a true action and close tolerances on the firing pin/ bolt face, you can develop more velocity without seeing certain pressure signs. That doesn't mean that there is less pressure, it just means that you can't depend on primer flow or resistance on bolt lift to see it before it is well above the accepted pressure level for the cartridge. As well , calculations such as Quickload are not an exact science, because contrary to what some people believe, not all chambers are cut to SAAMI standards, not all people seat bullets to the standard SAAMI COL, and not all components are exactly the same. A person can depend far too much on SAAMI cartridge drawings or on calculations, to predict what you think should be happening in your rifle, or you can look at the results of the load being fired in your rifle to get a better idea of what is actually happening.
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Quickload may not be exact, but it is software that will reliably predict loads for any cartridge/chamber/barrel combinations ...if it is used correctly. Data presented by Quickload for any cartridge load combination will be erroneous if the inputs are not correct for that particular load..
First of all, a Chronograph is necessary.
Secondly, Chronograph results from a particular load must be must be documented.
Next, burn rates for a particular powder/primer/temp combination have to be adjusted to coincide with chronograph results. Powder burn rates apply to one particular load combination .. only.
Failure do make these basic adjustments to the QL software will amount to nothing less than a very rough estimate .. often not a good one.
Correct inputs will put you "on the money" very consistently.