Quickload has its uses, but you need to understand its limitations too.
There is a very fair review at http://www.6mmbr.com/quickload.html which explains this well.
Also be aware that the way Quickload's algorithms work appears to be a mystery, known only to "The Man", and who knows what has been changed in each (paid for) update, or what regression testing has been performed.
And users say it works best when used interactively with chrono (and even pressure trace) to adjust its "fiddle factors" to make the predictions match the results
"Nothing's perfect though, and there are things in reloading which are difficult to quantify. Starting pressure, weighting factor, friction proofing, powder temp, even bore volume. There are default values preloaded in QL for these, and they are normally wrong. Same with the default seating depths, bullet dimensions, powder specs, and case volumes. QL, out of the box is just a starting place. Make it part of your routine to correct these, else you forget or miss something."
There is a very fair review at http://www.6mmbr.com/quickload.html which explains this well.
Also be aware that the way Quickload's algorithms work appears to be a mystery, known only to "The Man", and who knows what has been changed in each (paid for) update, or what regression testing has been performed.
And users say it works best when used interactively with chrono (and even pressure trace) to adjust its "fiddle factors" to make the predictions match the results
"Nothing's perfect though, and there are things in reloading which are difficult to quantify. Starting pressure, weighting factor, friction proofing, powder temp, even bore volume. There are default values preloaded in QL for these, and they are normally wrong. Same with the default seating depths, bullet dimensions, powder specs, and case volumes. QL, out of the box is just a starting place. Make it part of your routine to correct these, else you forget or miss something."
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, nearest was a 49.8gr load that produced 2931fps so 50gr load will be up around 2950fps easily, ones I tried originally at bisley were 50.6grs of n160, they would of taken me over 3000fps i reckon,that was sierra accuload fps, usually the ammo doesnt achieve data velocities, this time it excedes them 
