7mm RM Shhhhh

Lots of talk lately regarding suppressors on the larger guns failing, some failing on the smaller guns :(

Also lots of debate regarding thread size, suppressor length, material, weight

Without causing a supressor maker shit fight, any ideas on a suitable brand suitable for the 7mmRM?

I don't want it fitted all the time, would screw it on when I want so it would be on and off all the time. I guess because of this it would need some shoulder to pull up on?

Another thing I'm not sure of is barrel length? Don't really want to trim bugger all (if any) from a 26" barrel, is this possible or would it get ridiculously long and stupid?

Any advice would be appreciated.

I have a gunworks fitted to mine which is 24". It does make them a bit heavy in the front but still very manageable. Robbie will also attach a sling swivel stud to the back of the suppressor so that it rides lower on your back when slung over your shoulder. This is the only one I have experience with in mag sizing. Has had its moments of being "rather warm" and no issues. On a still cool day you get mirage after 3 shots from the heat build up in the suppressor which can cause issues.

Cheers HH, I know this topic has been done to death but I want to get it right the 1st time.

Is a POI change normal on vs off?

I think it would suit my longer range hunting style better to have it in my pack and screw it on when I want. Would still be good to be able to smack over a deer without it though if I wanted without adjusting the scope to suit...

Edit- just read an older thread regarding this.

Expect some POI shift, so zero rifle with it for the longer shots...

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Originally Posted by Tui4Me

Lots of talk lately regarding suppressors on the larger guns failing, some failing on the smaller guns :(

Also lots of debate regarding thread size, suppressor length, material, weight

Without causing a supressor maker shit fight, any ideas on a suitable brand suitable for the 7mmRM?

I don't want it fitted all the time, would screw it on when I want so it would be on and off all the time. I guess because of this it would need some shoulder to pull up on?

Another thing I'm not sure of is barrel length? Don't really want to trim bugger all (if any) from a 26" barrel, is this possible or would it get ridiculously long and stupid?

Any advice would be appreciated.

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ask smiddy:thumbsup:

I had a look at the Zigliani supressors at the LR shoot in Feb (Gabe had one there that could be taken apart to see the construction). I was very impressed with it, and will get one for my 7mmSAUM switch barrel when I get round to sorting it out. They are a little heavier that Gunworks etc, but for what I want it for thats not a problem(LR practice, probably won't be carrying it any great distance).

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Originally Posted by The Claw

I had a look at the Zigliani supressors at the LR shoot in Feb (Gabe had one there that could be taken apart to see the construction). I was very impressed with it, and will get one for my 7mmSAUM switch barrel when I get round to sorting it out. They are a little heavier that Gunworks etc, but for what I want it for thats not a problem(LR practice, probably won't be carrying it any great distance).

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Will you leave it fitted all the time?

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Originally Posted by Tui4Me

Will you leave it fitted all the time?

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Don't leave your suppressor on your rifle, it will corrode the barrel :smash:

Cheers KG, so is everyone cutting 2" off the end of their 26" barrel?

Seems a pitty to loose the speed :oh noes:

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Originally Posted by Tui4Me

Will you leave it fitted all the time?

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When shooting, yes. But not when the barrel/rifle isn't being used.

If you don't intend to carry the rifle with the supressor on (i.e. put it on when you get to a shooting possie) I would stick with the 26" barrel. I had a Gunworks Magnum Supressor on my 7mmWSM with a 24" barrel. It was a prick to carry round in the scrub/bush with the supressor on (i.e. still to long with a 24" barrel)

Cheers mate that's what I was thinking as well...

Only thing I'm not sure of now is what contour TrueFlite and what thread size to use.

I'd be Fu@&d off if the threading ment the barrel would'nt shoot to it's full potential.

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Originally Posted by Tui4Me

I'd be Fu@&d off if the threading ment the barrel would'nt shoot to it's full potential.

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You been reading the net too much ?? :D

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Originally Posted by Kiwi Greg

You been reading the net too much ?? :D

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I Know...chicken aye!

Look at the 14 x 1 thread on the other topic, plenty of shoulder on that and enough meat on the barrel still.

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Originally Posted by Mike H

Look at the 14 x 1 thread on the other topic, plenty of shoulder on that and enough meat on the barrel still.

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Sounds good to me, and even better that you've been a Guinea Pig and done it 1st!

Will be watching with interest :x_x:

I looked into the whole thread size thing and relieving stress etc. Opinions were divided on whether it is an issue or not. The amount of shoulder is less of an issue hence I went for less shoulder and bigger thread just in case the stress thing is for real. Dan said that was the thread he'd use anyway.

http://www.nzhuntingandshooting.co.n...998/#post10559I've just done a 7mmRemMag with a Hardy suppressor. see this post

Yep been through thus shit, I had a 7mm rem mag, with hardy suppressor, was to long for me, speed with amax was 2975fps out if 24in tube, sold it.

Just built a 7mm saum, 23in barrel, with a tuiman2 suppressor, 3 inches forward, stainless construction, under 400grams, couldn't be more happy, 162 amax at over 3000fps, extended mag box to can seat to lands with something like 2mm to spear, short action, love it so far

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Originally Posted by Smiddy

Yep been through thus shit, I had a 7mm rem mag, with hardy suppressor, was to long for me, speed with amax was 2975fps out if 24in tube, sold it.

Just built a 7mm saum, 23in barrel, with a tuiman2 suppressor, 3 inches forward, stainless construction, under 400grams, couldn't be more happy, 162 amax at over 3000fps, extended mag box to can seat to lands with something like 2mm to spear, short action, love it so far

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Sounds like a nice setup, A great chambering for 2217 powder.

Mike,
Do not put a small thread on a button rifled barrel, especially a TrueFlite. They are the worst for opening up. You will get away with it on most Tikkas, there is usually little change in their bore diameter with even quite a bit of metal removal. But the worst muzzle bore growing we have seen has been with button rifled TrueFlites. We have seen the bore of a 300 RUM that had opened up 2 thou when turned down for a 1/2"x20 thread. Needless to say, it shot like shite! Cutting back to a section that hadn't opened up cured it immediately. Use a sensible/minimal shouldered thread size and you won't have a problem.
As to taking your can on and off, the biggy is making sure the rear bush has sufficient clearance on the outside of the barrel. This must not touch, or if you have some runout here (which you will even if your can is fitted true with the bore, almost no barrels are dead straight), then as you do the can up, it will contact the barrel differently and a tiny bit of change can seriously affect harmonics. We take properly fitted cans on and off all the time without POI shift problems. I would not shorten that barrel for your purposes. Just carry the can in your pack as you suggest, then screw it on when you get there. If the can is going to stay on permanently, then shorten the barrel by all means, but be prepared for a compromise in performance if its a magnum type cartridge requiring slow burning powder.
Short barrels and permanent cans work best with efficient cartridges like the '08's!
Greg

Thanks for that Greg, seems sensible to me.