Hang fires, get below 38 grains of h4350 or rl26, even in warm temps in a 22 creed and I get the split second delay.
Pin goes whack-huh-boom
22 creedmoor
- Thread starter Subhunter2
- Start date
Pin goes whack-huh-boom
An update for some N555, N560, N565, Superformance, and Magnum loads. I did a combination of ladders as well as some 3 shot groups. Of note cratering is not very reliable for pressure as I have a stock Rem 700 action with a non-bushed firing pin. The OAL was 2.338 for 64 BSB (Nosler 64 bonded) and 2.610 for 80 ELDX. Temp was 35 degrees and on/off rain. No ignition issues.
64 BSB and N555 was a disappointment. Velocity was only OK at 3490 at near starting loads of 44.5 gr, and pressure was obviously high with an ejector mark. Had to stop ladder.
80 ELDX/Superformance had good velocity with 3220 @ 43.4 gr. No pressure.
80 ELDX/Magnum was 3180 @ 48 gr. Some slight cratering.
80 ELDX/N560 was 3200 @ 44 gr. No pressure.
Tried some 3 shot groups with 80 ELDX/N565, with 44.5, 45.0, 45.4. All of these were quite heavily compressed, and also HOT. All had at least somewhat hard bolt lift. 45.4 was ave 3210, but w/ejector mark and cratering. Accuracy was OK
3 shot groups with Nosler 64 BSB/H4350 were much better, with 42.5, 43.0, 43.5. Very slight cratering at 43.5 but easy bolt lift and no ejector marks. 43.5 was ave 3575, and very accurate.
Was very surprised by the N555 results. I feel N565 is a little too slow for the 80's. Going to stick with H4350 for the lighter bullets, and try some groups w/N560 and Superformance. While temperature sensitive, I am not afraid of ball powders as I have had excellent results from them in other calibers (H335 is an all-time favorite in 223 for me).
64 BSB and N555 was a disappointment. Velocity was only OK at 3490 at near starting loads of 44.5 gr, and pressure was obviously high with an ejector mark. Had to stop ladder.
80 ELDX/Superformance had good velocity with 3220 @ 43.4 gr. No pressure.
80 ELDX/Magnum was 3180 @ 48 gr. Some slight cratering.
80 ELDX/N560 was 3200 @ 44 gr. No pressure.
Tried some 3 shot groups with 80 ELDX/N565, with 44.5, 45.0, 45.4. All of these were quite heavily compressed, and also HOT. All had at least somewhat hard bolt lift. 45.4 was ave 3210, but w/ejector mark and cratering. Accuracy was OK
3 shot groups with Nosler 64 BSB/H4350 were much better, with 42.5, 43.0, 43.5. Very slight cratering at 43.5 but easy bolt lift and no ejector marks. 43.5 was ave 3575, and very accurate.
Was very surprised by the N555 results. I feel N565 is a little too slow for the 80's. Going to stick with H4350 for the lighter bullets, and try some groups w/N560 and Superformance. While temperature sensitive, I am not afraid of ball powders as I have had excellent results from them in other calibers (H335 is an all-time favorite in 223 for me).
My understanding of N555 is that it is a similar but slightly slower burn rate to H4350, which should be perfect for lighter bullets. If it over-pressures before max with lighter bullets that would seem to indicate to me that it is not optimal for heavier bullets.
N560 seemed absolutely perfect for the 80's and my ladder went up to published Hornady max without any pressure at all and better velocities.
N560 seemed absolutely perfect for the 80's and my ladder went up to published Hornady max without any pressure at all and better velocities.
Is there a definitive difference in durability between Alpha, Peterson, and necked down Lapua SRP brass in the 22 Creedmoor?
Not 100% sure but I do have written down that Peterson has less capacity than the rest? Alpha OCD brass seems to be very well received. Lapua is Lapua.
New build on Precision 737R with a Stuteville Precision 20" Bartlien Carbon Fiber barrel. It's in a Magpul 700 stock now but i intend to put it in a graphite stock. I'm shooting suppressed with a Gemtech Dagger. All I've shot so far are the factory Hornady Match 80gr ELD-M and Hornady Precision Hunter 80gr ELD-X. The ELD-Ms are shooting better groups than the ELD-Xs. I'm using them for initial barrel break-in, shoot, clean repeat, so i haven'tgiven them a fair chance.
I have 100 pieces of Alpha SRP brass prepped and an starting loading tonight. I intend to start with the Hornady ELD-VT bullets, the try the Berger 75-80 grain bullets.
This is primarily intended as a coyote gun.
Finally getting settled.
24" Shilen Ratchet 1/7.5 twist
Rem 700/chassis
80 ELDX
44 gr N560
2.610 OAL
3250 fps, SD 6
Alpha LRP brass
Consistently in the 0.4-0.6 MOA group range for 5 shot groups.
Moderate load with no pressure signs. Hopefully stays that way with hotter weather.
24" Shilen Ratchet 1/7.5 twist
Rem 700/chassis
80 ELDX
44 gr N560
2.610 OAL
3250 fps, SD 6
Alpha LRP brass
Consistently in the 0.4-0.6 MOA group range for 5 shot groups.
Moderate load with no pressure signs. Hopefully stays that way with hotter weather.
