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I agree. I've still got to take it to my counter bored since there is no rifling in the last 1.5". Either it was decades of a steel cleaning rod or someone did a bad job counterboring.

Rifle is in garage so I'll check in a bit but its made around 1918 judging by another rifle with a slightly higher serial that stated it was made in 1918. Hopefully that one was correct. I was...

Thanks yes still waiting for a gunsmith to respond but now I am positive it is the muzzle. Whether it's a bad counterbore I can't tell but since I've probed down the muzzle there doesn't appear to...

That's exactly what I was thinking. I've read others have done it and worked fine. I did it with my Spanish Mauser and I didn't get it to shoot better but it was my first attempt. What size bit...

I was wondering how much bigger to go so when I was watching youtube videos of milsurps that were already counterbored and shooting fine the only one that mentioned the size of the counterbore was...

I better google for that. Midway probably has it.

I realized someone counterbored it and they probably didn't know what they were doing. They removed the rifling about 1.5" from the muzzle but no real edge for where the rifling begins. I'm no...

Thanks Cinders. I'll load up some 175g flat base tomorrow when they arrive in the mail. Between longer bullet, flat base, loading longer COL that will probably help. I might try the brass round...

Took better pics of the rifling at the end. Maybe they fade in the last couple millimeters so maybe not too bad to need counter boring?

Thanks Bob. I'm sure the flat base and loading a little farther out will help. It's like you said I need to make sure the bullets obturate into the groves. I took a couple pics of the muzzle and...

Yeah I call cheap bullets plinkers regardless of weight since plinker just means not serious target shooting vs match grade. All bullets are serious but match grade would be non plinking. I have...

Bob has mentioned using flat base bullets which I will use. It's the obturation he was saying I need to make sure happens so the bullet actually goes into the grooves. Loading much longer and...

I used my homemade took which is a case with 2 slits so I can pop a bullet on and test to see how long before it hits the lands. I must have had some crust or something before or just didn't notice....

I'll use the WC747 I have. It's a little faster than W748. It's made in the same factory. I already tested it for safety with the other 139g bt bullets so it's good to go. Thank you Bob

Thanks Bob, I'm hoping that's the case. I don't plan on selling it and I have some flat base bullets to try. I got a care package from a felling 7x57 guy <3 hehe. 139g spire point flat base, 120g...

Thanks Bob. The spec for the barrel is .275" for a 7mm Mauser and it slugged at .276" at the lands which I'm told is fine. The bullets I'm using are .284" but are 139g boat tail bullets which seem...

That's a good point. I should have got the flat bottom bullets. I have a few that someone else sold me but I'll probably need to use up what I have or try to trade. When I shoot 123g .310 bullets...

Hey guys,
I'm taking this ole girl to the range and getting massive groups like10" at 50 yards. I got a case and cut 2 slits and dropped a bullet on top then chambered to see where the lands pushed...

Thanks guys. I should be getting my extra spring in the mail in a couple days so I'll do 1/2" and see. Managed to get some MP 540 powder which seems to have a similar burn rate to N540. It's on...

Hey guys,
Just wondering if anyone has removed any bolt spring coils from their M93 or similar cock on close Mauser. I'm just going to shoot this from a bench so it's not a big deal anyways but I...

Hey guys,
I'm wondering if my RIA actioned receiver has the correct bolt. I have a 1903a3 that doesn't have the cutout on the stock and one that does and my 1903 stock also does but this is a...

Hey guys,
I want to resurrect a 1903 Rock Island Arsenal receiver back to milspec configuration. If anyone has a barrel that would be great. I do have a RA 2-44 barrel on it now in perfect...

I've seen Redfield and Leupold for around $22 and S&K for $70. I have one hole at the front rounded end of the receiver and one at the rear flat part of the receiver. The Redfield has one hole on...

I used this one:

U.S. Military M1903, & M1903A3 Rifle: Remington:
Covering numbers: 3000001 - 5784000.

I got this result:

The year of manufacture for serial number 5005375 is 1942.
...

He gave it to me a couple days ago so I did some research. I'm going to guess it was WWII production, but maybe someone can chime in and tell me with that s/n about when it was made. It has a...