Fed. 210M and Cratering

[260Remshtr]

I loaded several different powder charges of H4350 in my .260rem, and none were near book max, but all cratered with Fed. 210m's. I had several other primers available and none of those showed any signs of pressure, and other than the cratering, there wasn't any signs on the cases loaded with Fed 210m's. The primer cups were still rounded and there was no problems with headstamp, and no extractor/ejector marks.

I talked with another shooter who I know has shot 210m's before and he said he had the same problem so he switched to BR2's.

Anyone else have this problem?

My loads ended at 43.5grns of H4350
Started at 42.5grns of H4350
All cratered.

Thanks in advance.

 

[260Remshtr]

I guess I should state that I was shooting the 142SMK and 140Berger VLD, jumping a minimum of .010in.

 

[Minesweeper3433]

I have the same problem in a 300 win mag but only worried about it when the edges of the primers started to get sharp on firing. I went on this because I loaded 2 rounds in each grain weight for my powder from min to max in .5 grn amounts and shot them. I didn't even get to the 3rd pair before cratering but I made it to 4 grains over and compressed before any strain on opening the bolt or primer flattening. Still only shoot book max but good to know that my chamber safely handles it without excessive strain on my brass.

 

[STP]

I used Winchester brass with 142gr SMK`s and nearly the same charge of H4350 with 210M primers in a Savage for 1K and had no issues as you describe. What brass are you experiencing this issue with?

Regards,

Scott

 

[260Remshtr]

Win. 7mm-08 necked down and neck turned, and Remington .260brass neck turned

 

[treeman]

if you have the firing pin turned down to 1/16" and bush the hole you won't have that problem. I was haveing that problem in a 6br with cci450's it fixed the problem.
Darrell

 

[K22]

Used them exclusively for many years in the 22 250, 243, and 308 and never had any problems but I usually load a grain or two below max.

 

[markm87]

I get primer flow into the firing pin hole with BR-2 and 210M in my .308 168SMK loads.

I'm running 42.8 grains of Varget in FED and LAPUA brass.

 

[JohnMill]

By all means send your bolt to Gre-Tan for bushing the firing pin. Great job and fast turn around. We had 3 done and 2 more to go. 65 bucks or so (call them about that). Use USPS as they are/were off the Browns beaten path.
John

 

[260Remshtr]

So do I continue to load these primers?

 

[STP]

If you can, get one or two sleeves of the BR2`s and try them for comparison in your rifle. I have had only one cartridge that seemed "picky" as you have described, and that was my 6BRX. The Remington primers I tried first gave the same symptoms. When I switched to the BR4`s, the problem vanished.

Regards,

Scott

 

[bheadboy]

i have used 210's in 22-250, 7-08ai 7-08, 280ai 7br and 300wm, never had the problem, check the firing pin hole

B ob

 

[260Remshtr]

Tried the CCI's and no such problems...tried the 210m's in another rifle same problem.....

 

[HPMike800]

my 260 140 gr load was around 41.8gr H4350 for 2800 out of 30"bbl. 43.5 sounds pretty warm. What books are you using? How's bolt lift? My books max out about 41.5-42.5 for the various 4350's.

Mike

 

[42769vette]

i had one 260 that showed pressure signs @ 42.5 of h4350. another 260 didn't get pressure till 44gr. depending on the book you look at for the 260 some show max as low as 41.5 and others show max as 45.

 

[ava123]

i have a new 260, standard, thirty inch barrel. shoots small hole groups now, today into the 150 round count. have used HSc 4831 and 140 smk bullets, jumped about .005, and it must shoot 45 grains of the HSC powder. no good with lower powder charges.

 

[260Remshtr]

I use the Hodgdon Manual. Three other brands of primers with the same load have not shown pressure, and I've shot almost a thousand of the CCI's through my other rifle with no problems (same load, same cartridge specs just .047in shorter in the throat).

In studying the problem I think the Federals that I recieved are soft, and I am going to stop usage and switch back to the CCI's.

 

[Flouncer]

I use fed 210m exclusively ........

Started a load for 8x57Mauser with Relaoder 17. There is no published data, I called the Sierra tech Line. One of things they told me was that the Fed 210m are the "softest" and the hottest. Their words, not mine. : This meant the loads I was using had 2 factors of safety if I was vigilant to primer flattening relative to using hotter harder primers.

I would switch primers before I pulled anything apart and sent $$$ it anywhere.