The 22 creedmoor thread

[jk_minn]

Anyone running the Alpha SRP with 450s still seeing hang fires in the cold, even though they have the larger flash holes (0.080) relative to other brands SRP brass?

 

[prcwv]

Anyone running the Alpha SRP with 450s still seeing hang fires in the cold, even though they have the larger flash holes (0.080) relative to other brands SRP brass?

Ive never had an issue with Alpha SRP, hunt year round never a misfire

 

[waspocrew]

Anyone running the Alpha SRP with 450s still seeing hang fires in the cold, even though they have the larger flash holes (0.080) relative to other brands SRP brass?

I've had a hang fire happen twice with Alpha SRP and CCI 450. This was with Varget and the 62 gr ELDVT while working up a load last summer. It was odd - hear the firing pin drop, then split second later, the cartridge fired.

Only happened while doing load development and at the lower end of the charges I was testing (which were plenty full). Did not happen at all during the winter months when hunting predators.

 

[Lawnboi]

Anyone running the Alpha SRP with 450s still seeing hang fires in the cold, even though they have the larger flash holes (0.080) relative to other brands SRP brass?

I did when I had a 22 creed barrel.

 

[prcwv]

I've had a hang fire happen twice with Alpha SRP and CCI 450. This was with Varget and the 62 gr ELDVT while working up a load last summer. It was odd - hear the firing pin drop, then split second later, the cartridge fired.

Only happened while doing load development and at the lower end of the charges I was testing (which were plenty full). Did not happen at all during the winter months when hunting predators.

Damn thats crazy ive got several hundred rounds on this brass an never had a hang fire. I run 39.2 of Varget with 75 eldms. I did ladder testing with a bunch of different powder an never had an issue.

 

[waspocrew]

Damn thats crazy ive got several hundred rounds on this brass an never had a hang fire. I run 39.2 of Varget with 75 eldms. I did ladder testing with a bunch of different powder an never had an issue.

Definitely weird. Only time it’s happened. I’m a good 150+ rounds past that with the same combo and no issues. Might go back the LRP brass once l retire this batch of the SRP.

 

[khuber84]

Alpha srp brass been good for me. Healthy dose of N555(slower burning) with cci450 been good down to single digits, fired prob 20-25, rounds last winter in -10° F, no hang fires.

Edit#
Will also add I tested heavy charges of rl26 with cci450 2 winters back in alpha srp brass in 22cm and 65cm, no issues in negative temps.

 

[prcwv]

Definitely weird. Only time it’s happened. I’m a good 150+ rounds past that with the same combo and no issues. Might go back the LRP brass once l retire this batch of the SRP.

I know with the LRP you'll see about 20fps more idk if you'll need to reduce charge or not. I went with SRP cause primers were harder to come across at the time I got over 4,000 of the 450s so I'll stick with them lol.

 

[amassi]

Definitely weird. Only time it’s happened. I’m a good 150+ rounds past that with the same combo and no issues. Might go back the LRP brass once l retire this batch of the SRP.

What action?


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[Jake Leibke]

Anyone running the Alpha SRP with 450s still seeing hang fires in the cold, even though they have the larger flash holes (0.080) relative to other brands SRP brass?

I did when doing some load development. Only had it happen with H4350.


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[waspocrew]

What action?


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Zermatt TL3

 

[waspocrew]

I know with the LRP you'll see about 20fps more idk if you'll need to reduce charge or not. I went with SRP cause primers were harder to come across at the time I got over 4,000 of the 450s so I'll stick with them lol.

I'm pretty committed to the CCI 450s as well haha. Several bricks sitting on my shelf.

 

[BBob]

Zermatt TL3

Those are short pin fall actions. Usually in the realm of .200"-.220". I'm always surprised how well they do overall compared to others (Rem and Rem clones) that can have issues with less than .230"-.240" ish of fall.

 

[KHntr]

Note to self, 77 TMK at Creedmoor speeds are not fur friendly at 3100 fps impact velocity.

In fact, if you are a coyote peeking around a tree and you leave 4” of hip and paunch visible it will result in your liver and stomach being forcibly removed through an 8” hole in your hide.

 

[KHntr]

 

[HighUintas]

Those are short pin fall actions. Usually in the realm of .200"-.220". I'm always surprised how well they do overall compared to others (Rem and Rem clones) that can have issues with less than .230"-.240" ish of fall.

As long as the firing pin has enough mass and velocity the fall shouldn't matter, right?

 

[dirtytough]

Anyone running the Alpha SRP with 450s still seeing hang fires in the cold, even though they have the larger flash holes (0.080) relative to other brands SRP brass?

I’ve shot down to -25* and haven’t had an issue yet.

 

[khuber84]

Those are short pin fall actions. Usually in the realm of .200"-.220". I'm always surprised how well they do overall compared to others (Rem and Rem clones) that can have issues with less than .230"-.240" ish of fall.

The tl3 is short on fall, I measured mine it was around 0.200. All of my origins are near 0.240 which is spec to rem 700 clones. I'm unsure why zermatt went short on the tl3, the cocking & opening forces are lighter VS the origin but not by much. I prefer the origin over the tl3 for non competition rifle builds.

They will generally flute the pin and decrease the weight to increase speed, which improves the lock time, but lighter pin lighter spring less fall, all equals less ignition energy on the primer. This is all in the chase for light bolt lift, less rifle disturbance, competition rifle actions. I do not know if the pin on a tl3 is fluted, I'll have to check.

 

[BBob]

As long as the firing pin has enough mass and velocity the fall shouldn't matter, right?

No, pin fall typically has a lot to do with it and is usually more important than the other factors involved but that action is pretty much like any other Rem clone (except for the short pin fall) but for some reason it isn't affected as much as the others. It doesn't have more mass to the pin nor much or any higher spring force so why it does as well as it does I don't know. It's a little bit of an anomaly in the sea of Rem clones. I haven't delved into one deeply but I do have one with me at the moment and I'm going to look further.

 

[Schmo]

I do not know if the pin on a tl3 is fluted, I'll have to check.

I don’t think it is