6.5 Creedmoor Lower Nodes

[General RE LEE]

I’ve settled on 41.5 grains H4350 with 143 ELDX. It’s accurate but when shooting suppressed, I’ll get a high pressure bolt lift and case mark after 3-4 shots in a row. I’m considering loading a ladder in the high 39 to mid 40 grain range.

Anyone shooting a lower node in 6.5 Creedmoor?

 

[Finaddictions]

I’ve loaded down quite a bit, and it’s worked extremely well. I started loading down for my PRS rifles so I didn’t have pressure issues shooting in hot, humid, rainy and or dusty matches. What I found were most of the loads I was using got even more consistent. SD’s were better, and they were a bit more precise on target as well. I’m not at home to look at my loading data, but I think I landed at 40 grns of H4350 pushing a 142 SMK at 2696 out of a 26” Proof barrel. That experience really made me rethink loading down, and I’ve since done it with other cartridges with a similar effect.

 

[BKM]

My tikka in 6.5cm either likes a bullet and powder combination or it doesn’t. Powder charge has very little to no change in group size when shooting a 10 round group.

147eldm and 130tmk both shoot under 1”

143eldx is 1 1/4

All with H4350

 

[Lawnboi]

Only when shooting suppressed? Only noticed in cooler weather?

Any speed increase?

 

[BradArnett]

I'd just load up 10 at 40gr and shoot a group.

 

[Frozenlead]

Tikka 24” 6.5cm
147eldm 42-43gr N555 works good. 2600-2680fps. Seems to open up some once I get past the 2700range. Get bolt lift around 44.3

 

[General RE LEE]

Only when shooting suppressed? Only noticed in cooler weather?

Any speed increase?

Yes Banish Backcountry creates a lot of back pressure when hot or during a string.

 

[Lawnboi]

Yes Banish Backcountry creates a lot of back pressure when hot or during a string.

Not uncommon to see some pressure on a suppressed bolt gun during certain conditions due to bolt thrust.

When your shooting a string, and conditions are correct, ie a headwind, cool, moist air, I have seen on many occasions where I’ll get some signs from bolt thrust even on very mild loads.

My theory is that carbon dust and cold air hits the chamber and leaves enough film that your brass dosnt grab the walls of the chamber.

If this is what’s happening, which is likely if you’re only seeing it with a suppressor in cooler weather, down loading will not help you.

Instead when at the range I’ll use a barrel fan and be sure to keep the smoke headed out the muzzle and now back into the chamber.

 

[HuntHarder]

My buddy also has issues with his Banish BC causing high pressures. Overall, it's just not an impressive can at all.