I am breaking in a new 6 dasher, it's a dasher criterion barrel savage action. Cci450 and alpha munitions brass. I am currently using 32 grains of H 4350 and With alpha munitions brass. I'm getting good groups but oops but having a hard bowl lift and I know I have a really tight head space. I don't understand why I am getting a hard bolt lift.
6 dasher hard bolt lift
- Thread starter ranger3
- Start date
You have tight headspace? Is the bolt close and lift difficult with an unloaded piece on new brass? If so you could adjust your headspace with the barrel nut set up or bump your brass shoulder back .003”.
I run into that using Alpha brass in 6bra. Been told have to reduce powder charge with Alpha. I reduced half a grain and still have slight hard bolt lift.
wkdickinson
Gold $$ Contributor
I just put together exactly the same Dasher as you have, Savage Target Action, Criterion barrel, new Alpha brass. The load I am using is CCI 450, 32.3gr of Varget, with Berger 105gr Hybrids. I set my headspace up so the bolt will close with no effort on a PTG "GO" gauge, but if you add a piece of Scotch "magic" tape to the base of the gauge it's too tight. I haven't had any hard bolt lift issues. The brass has had 2X firings (annealed after each) and I set the shoulder back 0.002" with a Whidden "click", bushing die.
A guy I shoot with has a Dasher. He uses H4350 and is in the 34.5-35gr range, so I doubt it is your load. My guess would be your headspace is just set too tight.
A guy I shoot with has a Dasher. He uses H4350 and is in the 34.5-35gr range, so I doubt it is your load. My guess would be your headspace is just set too tight.
garandman
Bolt Gun Bodacious
How's his groups? I got some H4350 left over from 6.5 CM loading.
wkdickinson
Gold $$ Contributor
Good enough to win local F-class match at 600 yds.
Are you talking bout beaverface?
wkdickinson
Gold $$ Contributor
I hadn't heard him referred to as that, but I suspect I am LOL.
KMart
Gold $$ Contributor
I too have had this trouble with Alpha brass in the 6 Dasher. It does take less powder than LAPUA brass to get similar velocities. With Lapua brass, 34 grains of 4350 with 105 Bergers gives me a velocity around 3000 fps. Check your velocity and see if you are around that speed at 32 grains.
Another factor is that Alpha's original introduction of 6 Dasher brass was different/softer than the newer upgraded brass. The new brass is labeled as OCD brass on the box. It is suppose to be "better" at holding pressure.
Which brass do you have?
I have only tested the first generation of Alpha brass and I am not happy with it.
I have some of the new OCD brass but haven't worked with it yet. Too many irons in the fire.
Wild Willy
Gold $$ Contributor
I had a similar issue recently and my buddy pointed out that I hadn't wiped all of the sizing lube off my brass
Upgrades & Donations
This Forum's expenses are primarily paid by member contributions. You can upgrade your Forum membership in seconds. Gold and Silver members get unlimited FREE classifieds for one year. Gold members can upload custom avatars.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.
Click Upgrade Membership Button ABOVE to get Gold or Silver Status.
You can also donate any amount, large or small, with the button below. Include your Forum Name in the PayPal Notes field.
To DONATE by CHECK, or make a recurring donation, CLICK HERE to learn how.