A Picture Is Worth A Thousand Words….

Lancetkenyon

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Until you are so used to a 90* bolt throw, and the 60* stops where primary extraction usually starts, and you think to yourself...."Oh $#!T, why is my bolt locked up???"
 

AXEFORCE6

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My next rifle will be on a terminus action. Just do not know what cartridge yet.
 

Homebrewer

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After reading through hours of LRO build threads, I believe my lightweight 22" 6.5 CM AR-10 will be replaced/upgraded
with a Terminus Kratos lite running a 6.5 SAUM and a 24" Bartlein CFW 7.5t...

Dennis
 

flyer

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60° bolt throw is cool but it means primary extraction and cock-on-close both need roughly 50% more force than a 90° throw two lug unless you have something like this: IMG_20211003_213504~3.jpg
American Rifle Company Archimedes action, three lug, 75° bolt lift, no primary extraction cams. It uses a pivoting bolt handle as a lever for primary extraction so it works on the pull instead of the lift. And the cock-on-close is only about 20% heavier than a 90° throw two lug.

For my 338 RUM I like it mostly because it has extraction that will remove any case unless it is so stuck that the extractor rips a chunk of the rim off. Also the extractor is not rotating on the rim while it is extracting.
 

Joel Russo

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60° bolt throw is cool but it means primary extraction and cock-on-close both need roughly 50% more force than a 90° throw two lug unless you have something like this: View attachment 8622
American Rifle Company Archimedes action, three lug, 75° bolt lift, no primary extraction cams. It uses a pivoting bolt handle as a lever for primary extraction so it works on the pull instead of the lift. And the cock-on-close is only about 20% heavier than a 90° throw two lug.

For my 338 RUM I like it mostly because it has extraction that will remove any case unless it is so stuck that the extractor rips a chunk of the rim off. Also the extractor is not rotating on the rim while it is extracting.
Not unless you have engineered the receiver to combat the issues you speak of.
 

rfurman24

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60° bolt throw is cool but it means primary extraction and cock-on-close both need roughly 50% more force than a 90° throw two lug unless you have something like this: View attachment 8622
American Rifle Company Archimedes action, three lug, 75° bolt lift, no primary extraction cams. It uses a pivoting bolt handle as a lever for primary extraction so it works on the pull instead of the lift. And the cock-on-close is only about 20% heavier than a 90° throw two lug.

For my 338 RUM I like it mostly because it has extraction that will remove any case unless it is so stuck that the extractor rips a chunk of the rim off. Also the extractor is not rotating on the rim while it is extracting.
As Joel stated that’s simply not true unless it’s designed improperly. Joel’s actions are amongst the best.
 

Ladd

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60° bolt throw is cool but it means primary extraction and cock-on-close both need roughly 50% more force than a 90° throw two lug unless you have something like this: View attachment 8622
American Rifle Company Archimedes action, three lug, 75° bolt lift, no primary extraction cams. It uses a pivoting bolt handle as a lever for primary extraction so it works on the pull instead of the lift. And the cock-on-close is only about 20% heavier than a 90° throw two lug.

For my 338 RUM I like it mostly because it has extraction that will remove any case unless it is so stuck that the extractor rips a chunk of the rim off. Also the extractor is not rotating on the rim while it is extracting.
Before you go any further with what you’re pushing...in Joel’s thread, you should do a bit more research. If you did you would have known that the Terminus actions, with the 3-lug design, have accounted for your argument in its thoughtful design and engineering. I have 4 Terminus actions and enjoy, without any issues or differences, the way they function, cycle, operate, open, close and work. They look awesome and perform just as much.
 

flyer

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So there is no primary extraction on bolt lift?

Interesting.
 

rfurman24

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So there is no primary extraction on bolt lift?

Interesting.
Have you used a Terminus? If not don’t be telling those who have how they feel. Yes they have primary extraction and it’s no more difficult to operate the bolt than most other actions out there. Joel uses a roller cocking piece to reduce the required effort to open the bolt. You mention force for cock on close. A properly timed action will have only an imperceivable amount of cock on close so it does not require more force to close the bolt. We get you like arc. This thread is about Terminus. Add to the discussion or keeping moving to a thread that suits you.
 

Broz

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Have you used a Terminus? If not don’t be telling those who have how they feel. Yes they have primary extraction and it’s no more difficult to operate the bolt than most other actions out there. Joel uses a roller cocking piece to reduce the required effort to open the bolt. You mention force for cock in close. A properly timed action will have only an imperceivable amount if cock on close so no it does not require more force to close the bolt. We get you like arc. This thread is about Terminus. Add to the discussion or keeping moving to a thread that suits you.
^^^^^^^ THIS^^^^^^^^^
 

flyer

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Sorry, the first picture had two actions, I thought it was a comparison.
 

DMP25-06

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Roy Weatherby's Mark V action has a 54 degree bolt throw , with 9 locking lugs , and is over 60 years old .
It is my personal favorite bolt action .

 

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