Lenwood901
Well-Known Member
Ag composite alpine hunter
Muller 26 in barrel
Defiance anti action
Hawkins bottom metal
Ti- pro 3 muzzle brake
Trigger tech trigger
Very happy how this rifle came out going to start with the 195s and retumbo
First custom rifle 28 Sherman mag
- Thread starter Lenwood901
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Ag composite alpine hunter
Muller 26 in barrel
Defiance anti action
Hawkins bottom metal
Ti- pro 3 muzzle brake
Trigger tech trigger
Very happy how this rifle came out going to start with the 195s and retumbo
Very nice first custom!
Great looking rig!
Lenwood901
Well-Known Member
Thank you guys If anybody has load data for this round please post here and I'll keep everybody updated with what I come up with
The Oregonian
Well-Known Member
I'm sure @elkaholic can point you in the right direction.
Lenwood901
Well-Known Member
I've been talking him he has been a big help people are using the n570 a lot and no retumbo
She's a beauty. Im sure it will shoot like a champ.
Lenwood901
Well-Known Member
I sure hope so I'll keep working at till it does 
D
Deleted member 109523
Guest
very well done! I didn't know muller made carbon wraps
A 28SM has 4-5gr less powder cap than a 28N, so they're both quite overbore. Getting the same velocity as a 28N with less capacity requires more pressure, so will likely have same throat erosion. N570 will exhibit the worst. Retumbo in a 28N will have around 8k per 100 rounds, N570 is close to 10k. It's just a lot of powder burning in a small bore. I shoot a 7/300prc with N570 and I'm seeing 7-8k erosion per 100 rounds at 79.4 gr charge weight. Ballistically speaking, while balancing recoil, big 7mms pushing 190+ gr bullets is as good as it gets on paper. They don't have the energy of big fast 30s and 338s, but they're flatter and with proper shot placement, just as effective in 90% of hunting scenarios.
Chamberman
Well-Known Member
I have the ShermanMag line up on a switch barrel system- 6.5 Max, 28SM, 30SM & 33SM
For the 28 SM I am using 80 grains of N570, GM215M primers, 315 neck bushing. I would start your seating depth at 60 off and work forward.
Longrange338allen
Member
I have a new build 28 Sherman Mag shooting 195s w N570 pressure (click) at 83.0 gr @ 3200-'/s dropped off 1.0gr and no pressure 3150'/s have nor shot the brass enough to
know about primer pocket and reloading times for the brass which is head stamped by Sherman (ADG)
Also loading 175 LR AB w H1000 79.0 gr easy bolt lift at3250'/s
if you get retumbo information I'd really like to have it
IM SHOOTING AT 1000' MSL, 85 DEG
AS ALWAYS WORK UP YOUR LOADS CAREFULLY AS RIFLES ARE DIFFERENT
know about primer pocket and reloading times for the brass which is head stamped by Sherman (ADG)
Also loading 175 LR AB w H1000 79.0 gr easy bolt lift at3250'/s
if you get retumbo information I'd really like to have it
IM SHOOTING AT 1000' MSL, 85 DEG
AS ALWAYS WORK UP YOUR LOADS CAREFULLY AS RIFLES ARE DIFFERENT
Lenwood901
Well-Known Member
I've been using the .314 bushing but loaded Lapua round is .316.5 going to order the .315 bushing. I loaded up 195s with retumbo to fire form brass also have h 1000 but thinking it will be too slow also have 180 vlds if the 195s don't work out
