Originally Posted by 264win
Been reading through this thread for the last few days, wanted to say thanks to everyone for all the great info.
I have been trying to decide between the the 7-300 and the 7 rem mag for a while .
If anyone has any more info or updates I would love to hear it.
Anyone have many rounds through a 7-300 yet ? wondering about throat wear .
Any tips or opinions would be great .
Thanks , Adam
Well, I've been putting off posting to do some more tests, but I'll give ya what I have so far. I have 312 rounds thru my bbl. It was a factory Remmie 26" take off that was a 7RM. Had a muzzle brake
installed & reamed to 7/300. This is a poorman build & learning tool and I don't think this bbl. will ever be a "tack driver" but for $50, I got what I paid for. Having said that some observations about MY bbl. YMVV/RCMV (muzzle velocity/round count) exercise all necessary safety precautions when loading YOUR rounds.
btw....kudos to Kiwi Nate, Broz, & TresMon for the help and encouragement......
Fireforming w/ 154g Hornady, 77g H4831sc,Nosler 300WM brass, Fed. GM 215 primers, expanded the primer pockets and case head dimensions. Discarded some brass.
Same components, but 70g H4350 was ok. Went on from there. (ran out of H4831sc).
180g Bergers, I got 3180 fps ave. w/ H1000 (78g) and 3150 fps w/ 77g. Shot right at or under 1moa. However, primer pockets so bad after only 3 firings, hadda throw them out. btw....40 thousandths off the lands to fit the mag box. (This load would be a good hunting load for ME, as I only elk hunt once a year and the cost of the brass would be nominal.)
160g Accubonds, 77.5 g H-1000 for 3225fps. 1.1 MOA also 40K off the lands.
So, I now know how to ruin expensive brass in a short time frame and achieve average results.....! Think I'll drop down in powder charge weights/velocity to find a more suitable node. I like to shoot 'em but at $1.10 each for brass, I either switch to a cheaper brass or find a better load. For other types of hunting I have a .280AI that is a laser w/ either 140g or 168g bergers and either one would also dispatch an elk handily.
Retumbo is in my future...
I also wanted to use this rifle as a learning tool to get back into reloading as I had quit for 17 years and had never loaded for wildcats. The rifle was my old 7mm Mag w/ 2500+ rounds and was shot out and my buddie gunsmith did the work for $250, so I don't have a lot in the gun. So, IF I don't lose an eye or kill myself, and can get knowed up on this caliber somewhat, I'll buy a GOOD barrel, and have a shooter that I didn't waste 500 rounds of bbl. life on the learning curve.
Adam, I'm excited about this round and think you'll do well IF you lean towards heavier bullets at faster speeds. Just the ticket IMO. Good luck to you.