Cfshooter
Silver $$ Contributor
Who made it? Custom reamer? You have it?
22 ARC Begins
- Thread starter Cfshooter
- Start date
Manson.
Finally got some results.
Going to try H4350 or N150 and see if there are better es and sd to be had.
Going to try H4350 or N150 and see if there are better es and sd to be had.
Cfshooter
Silver $$ Contributor
That thing is shooting great! What barrel again?
Its a a Shillen 6.5T on a Curtis Valor action.
Doing a primer test today.
I am having some issues chambering rounds. Occasionally one gets hung up about 1/2” before full battery. My first thought is the tip of the bullet is catching the chamber some where. Once I come up with a final load I will worry about that issue.
Cfshooter
Silver $$ Contributor
What brass are you using? After the hang up does it go in easy or needs a little force to get full battery?
Starline 6.5 Grendel brass. No problem going into battery. The problem is getting into the chamber. I think the mag feed lips need some adjustment.
Primer test today.
Cfshooter
Silver $$ Contributor
Looking good
No update yet, I am traveling for work. I’ll get an opportunity in two weeks. I ordered a mag feed lip tool and that was delivered yesterday so when I get home i will get it figured out.
I built a 22ARC for a varmint rifle. I used a Zermitt "Origin" action with a pre fit Benchmark 22" 1-8 barrel. I then bedded it into an old McMillan stock I had laying around. Everything I shot in it from 60s to 85 Bergers has shot really well!! This was a sample of groups during load testing. Last group is at 300yds. I decided to stay with the 77SMKs because I had a thousand of them on the shelf. I am getting right at 3150+fps out of them so what's not to like!!
Attachments
Update. (Reminder, this is a bolt gun. Do not attempt to repeat this load in a semi auto. Start low and work up.)
Did a ladder to find if the case runs out of capacity or generates too much pressure.
The 27.6-27.7gn loads were slightly compressed but I did not have to adjust the seating die to maintain CBTO.
Shot at 200m. No doubt that a little bit of the dispersion is due to shooter error, particularly the 27.3gn group. No real significant signs of pressure. 27.7gn had 3-4 difficult bolt lifts, the primers were not cratered and relatively flat (have seen flatter in factory ammo).
I am going to load up some 27.4gn and call it good.
Did a ladder to find if the case runs out of capacity or generates too much pressure.
The 27.6-27.7gn loads were slightly compressed but I did not have to adjust the seating die to maintain CBTO.
Shot at 200m. No doubt that a little bit of the dispersion is due to shooter error, particularly the 27.3gn group. No real significant signs of pressure. 27.7gn had 3-4 difficult bolt lifts, the primers were not cratered and relatively flat (have seen flatter in factory ammo).
I am going to load up some 27.4gn and call it good.
More testing today. Think I am going to call it good. The load meets my needs.
I cannot verify the BC at this point because I haven’t shot to distance yet. I use streloc or 4DOF to due the initial calculations then compare to the real world results and adjust the inputs then.
That’s a good speed for 80’s and that barrel length.
Understood. They look like they shoot great for you, the bearing surface just looks so long I was afraid velocity would be slow, but that doesn’t seem to be the case… and they are cheaper than the A-tips! Please provide and update if you are able to take it out to distance. I am hoping 4DOF is spot on because that is an impressive drag model.
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