Home Forums Hunting & Shooting Hunting Rifles 7mm Practical, anyone?

Just curious if anyone here has any experience with this cartridge. Looks like a well thought out 7mm-300 Win Mag and very tempting. Much like a Mashburn. I like the numbers on it being a little more than a 7 Remington Mag but not as harsh as a RUM or Nosler. Yeah, it’s a niche but a good one.

It’s really the same as a 7-300, 7 Mashburn, etc... all three are kissing cousins in capacity. I’ve enjoyed the Mashburn a bunch but as some folks like to point out, there isn’t any data out there so the best you can do is work up using 7 Wby data.

Same here. Looked at the Practical really hard but decided on the Mashburn, just for nostalgic reasons. 2 peas in a pod, very minute differences.

I read up on it and it looks interesting but, like you guys have said it’s basically a redo of the Mashburn. I think the Mashburn actually has a little less body taper and the same neck length roughly so the nod would go to the Mashburn for velocity ever so slightly. They state it’s nothing more to it but sizing 300 WM cases in the FL sizing die and fire forming with the loads on their site. Not sure what the Mashburn entails. It’s been a little while since I looked at what Dober PM’d.

I really enjoy working with the Mashburn!

It’s no better than the 7-300, 7 Practical, 7 Weatherby, 7 Dakota. But you can get high quality dies, good brass, great bullets. It’s a Wildcat but several of us around that have messed with powders from H4831 to R33 and everything between.

The 7mm Practical was what sent me in the direction of my 7.21 Sage. My version of the 7-300. Mine has minimum case taper and a 35 degree shoulder.

Shoots a solid 1/2 MOA or better. I’ve only shot three shot groups seeing it’s a magnum I use for hunting. Also from past experience it won’t be easy on throats. So I don’t heat it up. It’s a 8 twist, 3 contour Schneider Barrel. Took my first game with it this last fall season. Two Mule deer, one at a bit over 400 and one at 847. Both were Bang Flops with the Hornady 180gr ELD-M @ 3183 FPS.

Shoots the 162gr ELD-X well.

300yards 3325 FPS / This was my top end. I backed it down a bit.



300 yards@ 3256 FPS. My fireforming loads shot extremely well & fast.



300 yards



180gr ELD 300 yards @ 3183 FPS

SMACK



First off, I have the patent on Grocery Bag Target
background.

Second, I reckon that accuracy is good enuff ?


Congrats, Good Rifle & GREAT shooting.

Jerry

I have a Sako 75 SS V in 7mm Rem mag. It has maybe 20 rounds down the tube from the previous owner. The Mag box is 3.75 , can I clean up the chamber with either a Practical, 7mm=300 win or the 7.21 Sage ?

Yes. All three reamers mentioned will clean the chamber right up and all three use a standard .300 Win Mag “Go” & “No” go gauge.

7.21 Sage Cartridge (Left)
7mm Magnum case (Right)

That is way too easy, so the barrel will not have to be setback or anything? If so do you have a gunsmith you can recommend?

Kampfeld Custom

Thanks

Barrel length???????

24.3 or .5 not sure

Good information. So, with any of the mentioned (7-300, mashburn,sage,Practical) except the Dakota, you are basically sizing a 300 Win Mag case and fire forming much like an AI. Am I correct or simplifying? Now how does one deal with the magazine box properly Never knocked one out. This is a down the road project for me but not too far out. Would be a 700 or clone action.

That might be something to ponder. Usually these big boys want a minimum of 26" tube to see real results. It's like making a 24" 7mm mag to a 24" 7 STW........ I know I had a friend that reamed one out. Very disappointing gains.

I have thought about that as well. I used to own one of these in 7mm STW and it had the 26" tube

Reaming one out....

Better thinking would be to cut off a neck length of barrel shank and then a re chamber. Reamer dia vs old chamber dia could be a miss fit, not to mention if the factory barrel is not machined with bore and chamber aligned. There will always be some run out, how much is a question. The gunsmith will need some latitude in cleaning up bore alignment with chamber mis alignment with the new chamber. This can be more work than chambering a new barrel.

Also, don't expect any accuracy guarantee.

Fotus, excessive freebore and throat dia allows a lot of gas blow by resulting in velocity loss, not to mention bore dia varies...reamers and throat geometry count.

I shoot a 7 STW with a Pac Nor 27" tube, 140g tipped tripple shock at 3650, tiny groups...550 is a chip shot. Barrel is twisted for 140-150g Noslers with 3750 fps being a max load with accuracy for the 140g C/T bullet. Obviously, I don't shoot long range, just do not like running deer. Same load with a 140g Nosler C/T bullet has never failed brother and I also....never on BIG Kansas deer that go over 300 lbs out to 550 yards. Kansas record white tails run over 400 lbs...we have not seen any of these.

Since good Winchester brass has disappeared for the 7 STW, I have designed a 7 Mashburn reamer and a 7 Practical That I hope to chamber this year in Brux barrels for use in Old blue bag winchester brass. I did not design a CIP spec reamer for RWS brass.

WELL that's just great ! I ought to 'smack' SMACK !!
Something else to drool over & I just happen to have a GOOD donor complete rifle. Chamber reaming is all I'd need.

thanks alot ! (sarcasm - grin)
A very interesting idea.


Thnx Jerry


ps: I need help. Anyone have Rifleanon's ph number?