I am considering rebarreling what is currently a Remington M 700 chambered in 7 Rem Mag to 7 LRM for long range paper and steel. I want to be able to shoot the 195 Berger EOL at an honest 3k. For those of you that have a 7 LRM I'd love to hear your comments about the caliber.
7 lrm
- Thread starter quaticman
- Start date
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
You might want to confirm that you can find supplies for this chambering... as a proprietory everything, that may not be so easy in Canada at this time.
Lots of other big case 7mm's to choose from but personally, why???
Sounds like this is a target rifle, not a hunting rifle???? Why not just build something that will have the accuracy to hit anything and everything you want without huge costs, wear and recoil?
For a point of reference, current tech in F open allows shooters to hit a 5" circle on demand, and repeatedly at 1000yds on any given weekend. Not sure what your accuracy goals are but I doubt this isn't good enough. The sport has gone through many of the big magnums in the quest for "better".... it has fallen back to more conservative options and the scores have continued to climb.
If I can help you put such a rig together, let me know.... if you want to build a boomer, by all means. Can help with alot of larger chamber options too BUT extra horsepower may not actually help you way out there...if the goal is LR accuracy.
Jerry
Lots of other big case 7mm's to choose from but personally, why???
Sounds like this is a target rifle, not a hunting rifle???? Why not just build something that will have the accuracy to hit anything and everything you want without huge costs, wear and recoil?
For a point of reference, current tech in F open allows shooters to hit a 5" circle on demand, and repeatedly at 1000yds on any given weekend. Not sure what your accuracy goals are but I doubt this isn't good enough. The sport has gone through many of the big magnums in the quest for "better".... it has fallen back to more conservative options and the scores have continued to climb.
If I can help you put such a rig together, let me know.... if you want to build a boomer, by all means. Can help with alot of larger chamber options too BUT extra horsepower may not actually help you way out there...if the goal is LR accuracy.
Jerry
hi Jerry,
Curious, if you had to choose one go-to caliber for guys like me, who reload, and get their own guns built, what caliber would you recommend to shoot groups and to bang steal at between 600-1200 yards?
I have a 6.5 Creedmoor, which I love, and also have a 300 Norma Mag, which is really good at longer distances, but it beats you up a little bit if you're shooting all day long in the bush, and it's definitely pricier for brass and components.
Like to hear your thoughts and experience, thanks!
Curious, if you had to choose one go-to caliber for guys like me, who reload, and get their own guns built, what caliber would you recommend to shoot groups and to bang steal at between 600-1200 yards?
I have a 6.5 Creedmoor, which I love, and also have a 300 Norma Mag, which is really good at longer distances, but it beats you up a little bit if you're shooting all day long in the bush, and it's definitely pricier for brass and components.
Like to hear your thoughts and experience, thanks!
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Personally, I would use my 6.5 CM to smack rocks and gongs out to 1400yds. My rifle is just so easy to shoot and accuracy at distance has been superb.
But if you are looking for more and in another calibre, then the 7mm's are a great option. In F open, the 284 is dominant and the accuracy out to 1000yds is stunning even in high winds. the 7mm is so much more forgiving at 1000yds - drifts less, gets bounced around in the wind less so you score higher.
If you need to mag feed, this becomes more of a problem in a SA.. no problem in a LA.
I have the parts to put together a 7RM for my ELR set up.... this I will use from 1000yds to 2000yds. I have built several 7RM's over the years and I would lean on this chambering for the average shooter. Components and tools are off the shelf, no brainer. Keep pressures moderate with cooler, slow burning powder and bore life is excellent. I will be shooting 180gr class bullets but at "moderate" speeds. I would rather have easy tuning and stable accuracy then another 100fps and have a PITA to deal with.
The further you go, the less your initial velocity matters BUT your load tuning becomes ubber critical.
Short magnums are great but brass is hard to find, silly expensive and you are fighting case volume if you want to keep pressures down. I don't get worked up about the belt, no belt debate. Keep pressures down and the cases last a long time regardless.
With short magnum cases costing as much as 3 times more, I can toss alot of belted brass and not worry about it.
The 280 Rems are great too. I made up a wildcat years back... shot awesome and it got around the no magnum rule in F class that no longer exists so really no point today. If you want cheap brass with similar to 284 Win performance, this is where you go. The 280AI is pretty simple today... lots of dirt cheap 30-06 brass so it really isn't a difficult choice.
But again, I would rather have more case volume in the 7RM then need to keep things toasty in the smaller cases to hit the 2900/3000fps node.
YMMV.... the 7mms definitely are a great bridge in between the 6.5 and 30cal.
Jerry
I you want to run something around those velocities. You can just run a 7-300win mag (7 practical i believe) properly throated out with reload 33 powder. You can get the 195's to 3000fps with it. All you do is run a set of 300 win mag bushing dies with 7mm bushings to form brass.
Thanks Jerry, very informative, as always!
I am curious if you have ever played or have buddies who have shot the GAP 6.5 SAUM 4S? Seems like lots of guys are saying this is a great tweener caliber between the SA and LA. Has Hornady factory brass, and lots of guys seem to be getting 140gr bullets running in that 3100fps range with slower burning powders, (H1000).
I am curious if you have ever played or have buddies who have shot the GAP 6.5 SAUM 4S? Seems like lots of guys are saying this is a great tweener caliber between the SA and LA. Has Hornady factory brass, and lots of guys seem to be getting 140gr bullets running in that 3100fps range with slower burning powders, (H1000).
No idea on barrel life but brass isn't showing any pressure signs at all. I am using rem brass that is 300 saum necked down. Little bit of prep work to get it where I want it but way cheaper that the hornady stuff that I'm hearing isn't lasting to long.
Mystic Precision
CGN Ultra frequent flyer
- Location
- Summerland, BC
Back in the day, the 6.5-284 was dominant in F open. Speeds were in the 3000's, then they backed them down to high 2900's for better consistency. Barrels roasted very quickly and seeing a shooter barrel go kapoot during a match was not unheard of. The 284 Win came along, kicked everyone's butt and the 6.5 has been phased out at 1000yds
Now I understand that high velocity on unknown distance targets can be very helpful on making hits. If the combos can be made to stay in tune and the shooter has the pockets to keep them running, go for it.
Like drifting, you can do a turbo charged 4 banger and get crazy horsepower at elevated boost pressures. IF you can keep it alive, the performance is amazing.
Or you can run a larger displacement V8.. crank out similar horsepower but far more torque, not stress anything and running costs are far far lower... and things rarely break.
Would a mid case 7mm work in PRS??? no idea but if the matches had mostly 800yds out to 1500yds type stages, I would certainly want to find out.
I have shot side by side a 6.5 at just under 3000fps and a 7mm at 2800fps... at 1km, there was no comparison.. the 7mm ate the 6.5 for breakfast.
Jerry
Lol, actually the 284 was a reinvented wheel. Shoots pretty good for a "dead" cartridge. Have to agree with the results though, it works like a hot damn. - dan
