I finally got some GS Customs .375 414 SP projectiles to try out in the 375 DCM.
On Saturday I loaded some up with RL50 & went to the range to try to match the speed to my CEB 425 load.
The only one I fired went through the Oehler at 3170 fps a little faster than I wanted so I went back, pulled them, reloaded 6 more dropping the powder back by three grains & worked up.
This was the group they shot at 100 yards, things looked promising & I got my target speed of approx 3140 fps
It is 1/2 moa low & 1/4 moa left of the 100 yard zero for the CEB 425s.
My goal was to shoot the GS Customs 414, Cutting Edge 425 & my custom tipped Cutting Edge 425s at extreme distance to compare the BCs
I have been tipping the Cutting Edge projectiles for nearly a year now, it seems to hurt their BC a little but has no detrimental effect on accuracy & certainly makes them more aggressive on game.
So you can see the size of these projectiles they are here are next to a .223.
The barrel doesn't really like changing between the CEB & GSC bullets, it takes a while to settle down again.
The change from CEB to GSC is less noticeable than the other way around.
I HBN coat all the projectiles I fire except the GSC which appear to be Moly coated.
This and the different projectile materials, combined with the residues left in the bore could be the cause ?
A couple of things to note.
Before I shot this video I had only shot the seven GSC projectiles & had no idea how they would go.
I pay for all my own componets etc, no one gives me freebees, hand outs etc.
The rock I used as the aiming point is approx 1/8 moa, less than 3" around, about the size of you fist, the ATACR reticle nicely covers it.
I do this so I have a definitive point of aim, not some rock 4 moa across.
The three projectiles have different POIs at 2050 yards which is to be expected.
On the whole the groups sizes are very small & a testament to the projectile manufactures.
Here is the video I shot on Sunday, sorry it is so long I had a lot to fit in.