We have had good luck with the 90s out of Wylde chambered 1/7 Service Rifles, but that was only shooting them at 600 yards. We had planned to go to a 1K match, but it got rained out. I would be cautious if you are shooting them on acoustic targets at 1K, as I\’m not sure that they give enough of a crack to make the targets work reliably. If you are shooting paper, the 90s should work really well.