Pressure signs from suppressor?

[5MilesBack]

Peterson brass typically has a little less capacity, 1.5-2 grains depending on case.

For my .243 I posted about above with 108gr ELDM's, I reloaded the pulled bullets from the UM ammo with Norma brass to 2.80" COAL, loaded back 41gr H4350, and they averaged 2972fps. I also loaded new virgin Lapua brass the same.......CCI200's, 41gr H4350, and 108 ELDM's at 2.80", and those averaged right around 2850fps. It's always a crapshoot when using different brass. But I'll eventually narrow down to whatever brass I'm using and they'll be consistent, hopefully with speeds and pressures. The original UM loads had 42.7gr of H4350 and loaded to 2.71". So fairly hot load.

I have some virgin Peterson brass for my 6cm that I'm going to be loading at some point here. I'll adjust starting loads accordingly now.

 

[JF_Idaho]

Longer barrels do not increase chamber pressure.

You're right. They just increase pressure. Peak pressure is not equal to pressure.

 

[Lawnboi]

If there really was more pressure you would likely see a velocity increase as well.

The case is supposed to grab the chamber walls. When there is moisture lube, whatever in there keeping that from happening it seems the case gets smashed into the bolt face.

Iv chased this a few times. Now if I’m shooting in the winter I shoot my string quickly, and use a fan to keep smoke out of my chamber and out the muzzle.

That’s the only explanation I have found. I load farily low and have seen unexplainable pressure signs as well, almost always on cold days with moisture and a headwind.

I’d also agree that you are likely a little hot with Peterson brass . I have also seen h4350 vary in velocity depending on the lot.

 

[WoolyBugger]

If there really was more pressure you would likely see a velocity increase as well.

The case is supposed to grab the chamber walls. When there is moisture lube, whatever in there keeping that from happening it seems the case gets smashed into the bolt face.

Iv chased this a few times. Now if I’m shooting in the winter I shoot my string quickly, and use a fan to keep smoke out of my chamber and out the muzzle.

That’s the only explanation I have found. I load farily low and have seen unexplainable pressure signs as well, almost always on cold days with moisture and a headwind.

I’d also agree that you are likely a little hot with Peterson brass . I have also seen h4350 vary in velocity depending on the lot.

Seems plausible..

I would just think if it was purely over pressure, I would have sticky bolt lift on my very first shot of my rounds loaded for power factor. Or at least not be able to run through a string of 10 without sticking the bolt once.

 

[mt100gr.]

Hornady ammo has been extremely inconsistent the last few years. I have had back to back lots of 80gr ELD-M be over 100fps MV different, including way into pressure.

Copy that. I've seen where you've mentioned that recently. I bought a couple boxes to see if it'd give me a hint as to what bullet it likes and then plan to handload. Both 80s look promising for a first 10rd group, so thats back burner now. I'm really hoping that it shoots the 88 Ms )or the 88TMK if I can get my grubby hands on some)

 

[wind gypsy]

Shooting into a headwind in MN winter suppressed = pressure signs for me. It’s not a handloads issue, it happens with all factory ammo as well. Less so with 223 but with 6 and 6.5 creed for sure.

Good news is I don’t have these issues when spring rolls around and match season starts.