Thread: Best/simplest alternative to a ladder chart?

I decided to pursue this a bit and was able to get a spare hour plus to throw some new loads and get to the range.

So the cheapie Hornadys with a fairly "loose" weight tolerance were identified as a possible culprit. A new rifle with well under 100 rounds through it . . . . not much can be done about that except clean it - done. But I did redo the scope bases, put another scope up, checked action screw torque and made sure the mag box wasn't binding between the bottom metal and action - a common bug bear of remmy type actions with BDL arrangements.

The new load substituted Sierra 55s for the Hornadys. From the data gained from the previous session it was clear (via analysis with GRT) that it was safe to go up another step. GRT also suggested a node at 25.8gns but I resisted the urge to deviate from the initial test regime.

So hear are the results:



A wee bit different from the first but just as interesting!

Firstly lets deal with the shooting,the light was very low here, and that necessitated the exact opposite approach @Micky Duck suggests, a small aiming point will kill you in these conditions, use a generous one and let your eye centre the white/black elements of the target and reticle. Groups were shot round Robin style again, no allowance for cooling etc, just a very very hot and angry suppressor at the end!

The groups are a vast improvement but do they convey any different info - I don't think so. They still show a node where the point of impact change is smallest at just under 25.0 gns and with the benefit of the extra group, another at 25.8ish - which coincides with the GRT prediction.

Cheers