How much H335 behind 123 gr SST?

[natebonebusta]

I was able to produce 2464fps at the muzzle with my 1500 howa mini 18.5” barrel with a load of 27.9gr of H335 and OAL of 2.250. I did run my silencerco harvester. The 123 sst shot really well in front of the h335. I was hoping benchmark would be as tight, but it produced lower velocity, and a .25” larger CTC group.

[603 Country]

Without looking in the workshop for the records, I’m sure it was 2.245”, which was the recommended OAL for that bullet.