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Post by Deleted on Apr 25, 2015 18:37:12 GMT -5
I sent my .375 down to ohioguy and Dave w a couple months ago to try to get a head start on their load development. Well we have had the same issue twice now and I'm curious if anyone else has had it. I purchased the newest hunters bolt nose kit that comes with the firing pin spring and we have had two collapse and loose their tension. Dave has the rifle and he can pull the cocking piece back with a fingernail. Same thing both times, anyone else having any issues or have any ideas what could cause it?
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Post by jims on Apr 25, 2015 18:51:22 GMT -5
I have no idea other than I have had various springs that had excessive heat and they went soft/lost their tension.
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Post by cuda on Apr 25, 2015 18:59:01 GMT -5
It sounds like the springs were not heat treated right. Could you match it up with a Remington spring and see where you are for length. If yours is shorter you can shorten to fit. If yours is longer you could try a small bushing to make it fit. By using a Remington spring you know it will be strong enough and last. Just my 2 cents on this.
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Post by Deleted on Apr 25, 2015 20:33:35 GMT -5
no problems with any of mine and I have used a bunch, sounds like bad springs though??
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Post by Deleted on Apr 25, 2015 20:35:40 GMT -5
It's been a real bummer... Guessing faulty springs as well.
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Post by Deleted on Apr 25, 2015 21:01:05 GMT -5
Just talked to Luke and he hasn't had any other reports of puked out springs. It is possible this is related to the heavier .375 loads that Dave was trying to use. Could be he just likes to break my stuff and see how many times I will fix it for him..... He is getting a heavily modified version this week to ruin for me  |
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Post by hunter on Apr 25, 2015 21:32:51 GMT -5
If the bolt is not recocking from the shot, I would not think pressure could be the cause.
Did both springs come from the same place?
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Post by edge on Apr 26, 2015 5:15:26 GMT -5
One of the worst things for a spring is coil bind, but it is hard to believe that you could damage the spring with just finger pressure.
A spring should always have a slight gap between the coils when you are at full compression.
edge.
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Post by Deleted on Apr 26, 2015 8:19:38 GMT -5
Is that one of the bolts that you had plated?
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Post by rossman40 on Apr 26, 2015 8:22:29 GMT -5
It does sound more along the lines of a bad heat treat on the spring. If you have a early model 700ML the spring could be 15years old and you do not know if it was stored under tension/cocked. That's why I like to replace them. You figuire a factory spring is like $5 and a fancy Wolff is just over $8. Tubb used to make a chrome silicon spring for the Model 7 (same spring as a 700ML) but I think he stopped.
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Post by Deleted on Apr 26, 2015 9:29:34 GMT -5
This is a plated bolt. Not sure how parking could effect the spring but I have three more bolts that way to test out soon.
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Post by Deleted on Apr 26, 2015 9:31:26 GMT -5
This is a plated bolt. Not sure how parking could effect the spring but I have three more bolts that way to test out soon. Whats parking a bolt?  Any chance that parking got inside the bolt and is binding or sticking or dragging or whatever? |
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Post by Deleted on Apr 26, 2015 10:33:37 GMT -5
Plating parking what's the difference anyway!
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Post by rossman40 on Apr 26, 2015 12:49:25 GMT -5
The plating is only .0005 thick so it didn't loose that much clearance and the nickle would actually slicken things up I would think. It's not hardened so your looking at a surface hardness on the plating in the low 40s RC. Surface hardness on spring steel is pretty high IIRC. I have 700MLs out there that were plated as long as 6 years ago without the same problem. But then to be fair they may not have the round count if Cole's has been shooting pretty heavy every month.
Can't be worse then if a guy didn't kill the rust on a used 700ML. I've found several bolt bodies that were heavily corroded inside from lack of cleaning all the blast/powder residue out. If the previous owner used the weather sheild with caps all the junk goes thru the bolt instead of just some without the weather shield. I've seen one that was corroded all the way thru from the inside. I've used bore brushes to get as much out as possible in the past but have found a good brushing then a dip in Evaporust, with another brushing during the Evaporust dip, then plating (which also includes a acid dip) the best way to deal with a heavy rust inside the bolt body (beside just replacing it). I could maybe step it up a notch and hone the inside of the bolt body.
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Post by elkman1310 on Apr 26, 2015 18:55:17 GMT -5
I have posted several times that I am using a PTG XP100 firing pin assembly on my bolt conversions. I am not knocking the Hunter kit. But this PTG firing pin assembly is quality made. Also it makes the bolt nose longer which puts the nose of the bolt inside the barrel.
You end up with a depth of about .500 recess into the barrel. The barrel shank is really long on the Rem ML so this does not create any problems. I use a Lee 5.7x28 FN shell holder for the 209 primer. This bolt conversion does require machine work but it really makes a nice job when its done.
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Post by kennacl55 on Apr 26, 2015 20:30:04 GMT -5
Dave W. I sent you a pm concerning firing pin spring.
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Post by Dave W on Apr 27, 2015 11:39:17 GMT -5
Thanks for the offer Kenny!
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Post by Deleted on Apr 30, 2015 16:29:55 GMT -5
Here's a pic of the collapsed spring next to a new one, looks identical to the last one that did this. Both from the same bolt. Thanks  |
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Post by rob67 on Apr 30, 2015 16:43:50 GMT -5
Here's a pic of the collapsed spring next to a new one, looks identical to the last one that did this. Both from the same bolt. Thanks Change spring suppliers.!! Excessive spring tension will not do this to a quality spring, unless excessive heat is involved. |
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Post by Deleted on Apr 30, 2015 16:58:03 GMT -5
Dave has a new bolt with a different firing pin assembly in it. See if that cures the ailment.
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Post by Deleted on Apr 30, 2015 19:40:02 GMT -5
I've gotten a couple of PM's asking about torching from blowing primers. I've inspected the bolt and see no signs of this. The firing pin hole measure .102" and the pin .082", pretty loose but the same dimensions as the other bolt nose kits I have on hand. Still not sure we found the culprit on this one.
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Post by Deleted on Apr 30, 2015 19:42:35 GMT -5
Looks like Daves spring shriveled up and went limp on him |
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Post by Deleted on Apr 30, 2015 19:49:28 GMT -5
Looks like Daves spring shriveled up and went limp on him Hopefully this one is a winner so we can get some 375 testing completed. |
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Post by Richard on Apr 30, 2015 20:05:07 GMT -5
I have not had any customer complaints on my builds using these springs or on my own gun?
Richard
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Post by Deleted on Apr 30, 2015 20:22:53 GMT -5
Richard, I have around 20 out there now and Dave is the only one that has had this issue. Might by a heavy .375 woe but I can't imagine why? It would take quite a back blast to bottom the spring out.
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Post by Dave W on May 2, 2015 10:01:23 GMT -5
GoT the bolt yesterday Cole, looks good! Usually do not shoot on weekends, try to give it a go Monday.
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Any chance that parking got inside the bolt and is binding or sticking or dragging or whatever?
