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+--- Thread: Grendel Bolt (/showthread.php?tid=17111)
Grendel Bolt - Dead Center Miss - 09-23-2018
I'm in need of another Grendel bolt since the one that case with my Radical seems to be causing excessive headspace. I have a Odin Works BCG that I am using for now, and would like to get another Odin bolt but don't see where they offer just the bolt head.
What brands do you guys recommend for Grendel bolts?
Grendel Bolt - A5BLASTER - 09-23-2018
AA,PF,JP and Maxim firearms.
Are one of the group buy bolts from this fourm either one from the last group buy someone wants to seek are wait for the next group buy on bolts that's coming soon.
Grendel Bolt - Bigs28 - 09-23-2018
I don't know what barrel you have but determine what bolt size goes with it before you buy a bolt
Grendel Bolt - Dead Center Miss - 09-24-2018
Bigs28 Wrote:I don't know what barrel you have but determine what bolt size goes with it before you buy a bolt
Both of mine are type 2
Grendel Bolt - NugginFutz - 09-24-2018
DCM - what are your barrels head spaced for? 0.125" or 0.136" bolt face depth?
Grendel Bolt - Dead Center Miss - 09-24-2018
NugginFutz Wrote:DCM - what are your barrels head spaced for? 0.125" or 0.136" bolt face depth?.136"
Grendel Bolt - bj139 - 09-24-2018
If you buy another .136 bolthead do you think it will headspace differently than what you have?
If you think your headspace is excessive, why not resize your brass just enough to fit your barrel and bolt and just shoot.
Do you have another Grendel that you are trying to make all your ammo fit in both?
Grendel Bolt - Dead Center Miss - 09-24-2018
bj139 Wrote:If you buy another .136 bolthead do you think it will headspace differently than what you have?
If you think your headspace is excessive, why not resize your brass just enough to fit your barrel and bolt and just shoot.
Do you have another Grendel that you are trying to make all your ammo fit in both?
I do have a second grendel. With the factory bolt in the Radical I was getting .009" between the two chambers. I swapped the oden works bold from my other upper into the radical (the radical was the longer chamber) and my cases are only .001" different. I measured the locking lugs on the radical bolt and they are shorter, and starting to show obvious peening even though the upper only has a few hundred rounds through it. The bolt face is also deeper by .002" at .138"
Grendel Bolt - kpswihart - 09-25-2018
If you want an Odin give them a shout, 208-906-1405 or info@odinworks.com, they may be able to help you out.
Grendel Bolt - Dead Center Miss - 09-25-2018
kpswihart Wrote:If you want an Odin give them a shout, 208-906-1405 or info@odinworks.com, they may be able to help you out.
Was not aware Odin was in Idaho. Gives me more reason to want to use them.
Grendel Bolt - soloelcap - 09-28-2018
DCM
Are you reloading or shooting factory?. If you think you have excessive head space using a .136 bolt with the brass you are using and have the tools to measure the new brass and compare to the fired brass, you may be able to bump the shoulder and use a .125 (7.62x39) bolt.
I'm using a .125 bolt in a .136 chamber with new lapua brass and it works just fine.
All chambers are different, it's the users responsibility to check and know how to measure head space.
Grendel Bolt - A5BLASTER - 09-28-2018
soloelcap Wrote:DCM
Are you reloading or shooting factory?. If you think you have excessive head space using a .136 bolt with the brass you are using and have the tools to measure the new brass and compare to the fired brass, you may be able to bump the shoulder and use a .125 (7.62x39) bolt.
I'm using a .125 bolt in a .136 chamber with new lapua brass and it works just fine.
All chambers are different, it's the users responsibility to check and know how to measure head space.
I'm no expert and haven't been loading my own for very long but I would totally and whole heartly advice against doing this are telling others to do this.
There are probably hundreds of threads on this fourm alone of issues guys have had trying to run .125 bolt in a chamber cut for the headspace of the mrk136 bolt.
To be honest to me I think your playing with fire doing this.
Not saying I'm right but everything I have read and come to understand is you never mix the two bolt face depths up.
Grendel Bolt - soloelcap - 09-29-2018
A5BLASTER Wrote:I'm no expert and haven't been loading my own for very long but I would totally and whole heartly advice against doing this are telling others to do this.
There are probably hundreds of threads on this fourm alone of issues guys have had trying to run .125 bolt in a chamber cut for the headspace of the mrk136 bolt.
To be honest to me I think your playing with fire doing this.
Not saying I'm right but everything I have read and come to understand is you never mix the two bolt face depths up.
Read my post more carefully. I'm not telling others to do this. I said you "may be able".
If you know what head space is and have the knowledge and tools to measure it, then based on what your brass, bolt and chamber dimensions are, compare new brass and after firing. If you think you have excessive head space, say it is .009 as DCM has said he "may be able" to bump the shoulder down on his new brass and use a .125 bolt that gets rid of that .009 head space.
I have 3 lots of new brass right here in front of me, Lapua, Hornady and Starline. The shoulder to base varies from each brand by .007. Do the math. Take what you have, measure it and figure it out. All bolts, brass and chambers are different by a few thousands here and there.
I run a .125 bolt with Lapua no bump, Hornady I bump. Starline the .136 bolt no bump. Go figure.
Of course I'm playing with fire, it comes out the end of the barrel.
Grendel Bolt - A5BLASTER - 09-29-2018
soloelcap Wrote:Read my post more carefully. I'm not telling others to do this. I said you "may be able".
If you know what head space is and have the knowledge and tools to measure it, then based on what your brass, bolt and chamber dimensions are, compare new brass and after firing. If you think you have excessive head space, say it is .009 as DCM has said he "may be able" to bump the shoulder down on his new brass and use a .125 bolt that gets rid of that .009 head space.
I have 3 lots of new brass right here in front of me, Lapua, Hornady and Starline. The shoulder to base varies from each brand by .007. Do the math. Take what you have, measure it and figure it out. All bolts, brass and chambers are different by a few thousands here and there.
I run a .125 bolt with Lapua no bump, Hornady I bump. Starline the .136 bolt no bump. Go figure.
Of course I'm playing with fire, it comes out the end of the barrel.
Yea I get what your saying.
But I think I'm going to stay firm and say that mixing the bolts should be not done at all cost.
And I hope no one try's this, cause it just sounds like a dead end road to a mistake and a accident happing due to mixing up the brass.
Reason I'm basing this as unsafe as long time members here with more years doing their own handloads then I have been alive have said more then once don't mix the to different bolts.
Not hate you do what you feel is safe but, I don't feel this is safe and will advice others not to do this.
Grendel Bolt - soloelcap - 09-29-2018
A5BLASTER Wrote:Yea I get what your saying.
But I think I'm going to stay firm and say that mixing the bolts should be not done at all cost.
And I hope no one try's this, cause it just sounds like a dead end road to a mistake and a accident happing due to mixing up the brass.
Reason I'm basing this as unsafe as long time members here with more years doing their own handloads then I have been alive have said more then once don't mix the to different bolts.
Not hate you do what you feel is safe but, I don't feel this is safe and will advice others not to do this.
You don't get what I'm saying. Enough said.
Grendel Bolt - A5BLASTER - 09-29-2018
soloelcap Wrote:You don't get what I'm saying. Enough said.
Hold up don't go throwing your panties in a knot sir.
I do get what your saying, even with my limit experience in handloading. But let me explain myself a lil more why I feel what your doing and digesting is unsafe.
Sammi grendel
Grendel II
264lbc
Three chambers and all can come with headspace set to one of two bolts either .136 or .125
And they all can fire sammi grendel factory ammo as long as they use the bolt the chamber was headspaced too.
Now you go adjusting case lengths and shoulder angles and I'm sure I'm missing some other kind of measurement of the sammi grendel brass to make up or change headspace to work with a bolt not setup to headspace in that barrel well sir I'm sorry to me that is problem and your creating a accident in the making cause sooner or later it will happen and Murphy's law will bite you.
My second reason why I firm in my be live that doing it this way is dangerous is some of the more senoir members of this fourm who have been in the grendel game since the beginning and have more years of loading knowledge then I can hope to learn in the next 20 years have on many many many threads.
Said the proper way to figure out a headspace issue is to get the go-nogo gauges and also contact the maker or supplier of the barrel and confirm the bolt need for proper headspace and then to get the proper bolt for headspace.
Not once has any member ever said to adjust the case's measurements to make up or reduce headspace so someone could use a bolt that wasn't meant to be used in that barrel.
So now I'm very clear on why I don't think what you sujested is a safe practice to do.
Your free to do as you wish it's your rifle and your life but until a very senior member here clearly states that doing what you sujested is safe to correct a headspace issue, I would advice others not to try this method.
Sorry if that ruffles your feathers sir and I wish you a good evening.
Grendel Bolt - Mad Charlie - 09-29-2018
When I first started messin' with Grendel I built the first one with a Satern bbl and bolt from Brownell's, along with 200 Lapua cases and an assortment of bullets. The new Lapua cases datum-ed at 1.207. I started out with one of the starting loads found in a book and assembled five rounds. I took my new rifle out to my side yard where my backstop is and fired for function test.
Everything was peachy until I went back in the house and measured datum of the fired cases, to set up shoulder bump. My eyes almost bugged out when I saw 1.220! Having not seen anything like that in over 40 years of handloading, I thinks to myself "There has GOT to be something wrong with this barrel!" On the phone to Steve Satern, asking, "Did this bbl. accidentally get chambered for a 7.62x39 bolt or something? No, he says we check 'em all. Welll, ohh-kayy, if you say so.
So I just figured that I had a long chamber and had to fire form my cases, like the A.I. guys did. I bumped my case shoulders back .005 and continued merrily on my way. No problem. I later discovered that SAAMI min. is 1.220 and I didn't have a long chamber after all.
Then along came the Alexander Arms bbl, it datum-ed out at 1.214, so I keep my cases separated between the two, that and a set of Redding shell holders, makes it easy to get the bump I want, and brass catchers makes it easy to keep them separate. I have four bolts, they vary from.134-.136, I will load accordingly. I have the Redding shell holder sets for every bottleneck cartridge I shoot.
I am a very firm believer in firm contact between shell holder and die when sizing, I get the most consistent results this way. I use my 43 yr old Rockchucker to size cases, it has enough looseness now to pretty well self center. I seat with the Forster.
New Lapua-1.207
New Starline-1.2085-1.210
New Hornady-1.209
Hornady Modified Case-1.208- I just do the math when finding the lands with different bullets.
DCM, you might try these techniques, maybe help you out. I had thought about my bbl. being mis-chambered, but I did not consider actually using a 7.62x39 bolt before I spoke with Satern. Just bump the shoulder .005 and call it good. And mark your boxes.
Yeah, seems like these chambers are all over the place, and everyone that makes them thinks their idea is "better". How about everybody just make them to SAAMI.
Grendel Bolt - Dead Center Miss - 09-30-2018
soloelcap Wrote:DCM
Are you reloading or shooting factory?. If you think you have excessive head space using a .136 bolt with the brass you are using and have the tools to measure the new brass and compare to the fired brass, you may be able to bump the shoulder and use a .125 (7.62x39) bolt.
I'm using a .125 bolt in a .136 chamber with new lapua brass and it works just fine.
All chambers are different, it's the users responsibility to check and know how to measure head space.
I am shooting reloads. The Odin works bolt seems to have fixed my headspace issue.