My first 6.5mm Grendel Project - after 3 .223 Rem AR-15s

[Kohoki]

Hi guys,

I have been on the range today and tried the following loads with similar results on paper:

Load 1 - 25 rounds, 5 rounds each group
Hornady Case
CCI 450 Primer
27.0 grs VV N140
123 grs. Lapua GB489 Bullet
O.A.L. 57.0 mm / 2.244"

Load 2 - 25 rounds, 5 rounds each group
Hornady Case
CCI 450 Primer
27.5 grs IMR 4895
123 grs. Sierra Match King #1727
O.A.L. 57.0 mm / 2.244"

Load 3 - 15 rounds, 5 rounds each group
Hornady Factory 123 grs. Ballistic Tip

I cleaned the barrel after the first 25 rounds on the range. I am keeping a logbook for that rifle which shows that I shot 83 rounds cumultative. All 5 Shot groups were about 30 to 50 mm (1.18" to 1.96") wide. They were getting tighter after cleaning.

Is there a recommended precision load for the 6.5 Grendel you would suggest me to try out? Shall I change to lighter bullets? What load has proven ultra accurate?
Or shall I wait until the barrels running in process is completed (after about 200 rounds)?

Please remember, the barrel has a twist of 1/8 an is 20" long.

Please let me know your precision load data.

Thank you very much in advance!