In my 45/70 guide gun for big bears; I load a LEE 515 gr pure lead bullet over 27 grs of 5744, about 1200 FPS; not quiet but very effective......
In my 45/60 I load a LEE 500 gr pure lead bullet over 11 grs of unique; very accurate; somewhat quiet; puts deer down like right now...
Quiet is subjective ?? A .22 LR is quiet and will put deer down at 100 yds; not the best choice though ??
Remember that the gasses at the muzzle are 1 1/4 x the bullet fps. Unless really slow you still get the shock wave.
Whatever!
Try Trail Boss. Not being familiar with your caliber I can tell you about my experience with .41 swiss vetterli. 300 gr cast with WW. 13 gr trail boss. chronographed at 15 ft was 1150 FPS. battle sight at lowest it shot 16" high at 100 yds. My daughter was embarresd at the range. Big old long military rifle, sounded like a high powered air rifle. I have used trail boss loads with lead and jacketed for about 15 different old military stuff from 6.5 swiss to .43 dutch. that powder simply does not go BANG, it goes puff. I even stepped my .41 swiss loads to 16 gr max,chrono went to 1250, still sounded like an air rifle. But I have found Trail Boss works well with a lot of old black powder cartridge weapons.
I don't think "quiet" and the 45-70 go together even with can on the end of the barrel. Unless you are deaf to start with. james
12-15 grains of Unique pushing an RCBS 300 or Ranch Dog 350 is danged quiet out of a 34” Sharps, and accurate to boot. Deadly at my normal range… under 100 feet.
Shorter barrel guide guns are equally accurate with this load, but report is a bit more like a 45 Colt.
Last edited by pls1911; 12-20-2023 at 12:51 AM.
Salvaging old Marlins is not a pasttime...it's a passion
Using the trajectory tables, the 45/70 is easily PBR to 100yds using an 8" kill zone. surprised the heck out of me the first time I ran them.
JBM:
Barnes 300gr FNSP w/.227G1
1000fps
(my 45/70 shorty is scoped, longer ones use irons) Sight above bore 0.7"
worse case temp/pressure: no wind... at 100 yds, it makes little effect
assume gun capable of 2" groups at 100yds (makes easy maff)
Using an 8" kill zone, I calculate where the bullet is never more than 4" above/below POA (gives me close to real world trajectory)
MRT: 50yds
ZERO: 88yds
MaxPBR: 99yds 877fps/512fpe
I doubt any deer can withstand a center chest shot w/300gr .458 877fps
with a big heavy boolit, there's no issue with penetration
as for quiet? Noise levels are in the ear of the beholder!
If the gasses are 1.25 above, and you want to reduce any supersonic: use 800fps
MRT: 42yds
ZERO: 73yds
MaxPBR: 81yds
100Yds: up to 8" below POA
(still using my 2" grouping and 8" kill zone)
everything gets better with heavier boolits, warmer temps, higher sights, better accuracy...
my closest neighbour is over 500m away, I know nothing is silent, but I would like it at least not so noisy as to make them think "Home Invasion"
my longest shot would be under 50 yds.
I think a 420gr boolit at 750-800 would work just fine for my needs
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Thank you, guys...... this is the line of discussion I was hoping for! Keep it up!
Chicken Little has finally found an audience
Interesting thread. Most posts here are dealing with the report of the rifle with a given load.
Question I have is how good of a killer would a 300 - 310 grain soft lead slug be at a muzzle velocity of 800 - 850 fps with in 25 - 30 yards.
The more I think about it, the more likely I'd be going with a 400 grain or more flat point for penetration and b.c.. The longer slug should retain velocity better, even with a flat point. Oh, how my shooting budget would go up if I had a more accessible area to shoot!
Chicken Little has finally found an audience
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |