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Loading the TC Encore in 45/70

This is a discussion on Loading the TC Encore in 45/70 within the Reloading forums, part of the Firearm Forum category; Today I made it to the range with a handful of reloads using Unique and 405 grain Missouri Bullet Co. lead coated bullets and my ...


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Old August 26th, 2019, 02:55 PM   #1
 
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Loading the TC Encore in 45/70

Today I made it to the range with a handful of reloads using Unique and 405 grain Missouri Bullet Co. lead coated bullets and my 45/70. I was also carrying one of those new MagnetoSpeed Sporter chronographs. It's pretty handy in an indoor range!
I chronographed 13 through 16.5 grains of Unique (in .5 grain increments) through my Thompson Center Encore. When I hit 15.5 grains and 1,200 fps it printed nicely and had an ES in 3 shots of 2 fps. I may have found the sweet spot! Now for some fine tuning.



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Old August 26th, 2019, 03:34 PM   #2
 
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MALLEN, Nice, and thanks for posting. What length barrel?
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Old August 27th, 2019, 05:40 AM   #3
 
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20" barrel
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Old August 27th, 2019, 12:45 PM   #4
 
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Quote:
Originally Posted by Mallen View Post
20" barrel
Thanks again! Am wanting to use lower vel. rounds in son's classic 4570 marlin which had put aside for him 15 years ago, gradually get him used to it (with accuracy) tho he does very well w/ 12gu. pump in terms of recoil & on fly.

Found your charge range in Lyman book and also want to try in my shorter bbl, sounds like a great load range and will tweak as needed. Have an Encore too, but not that chamber/bbl.

Quickload tracks your cool sounding chrono pretty close as well, along with pressure range in Lyman book.
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Old September 10th, 2019, 04:22 PM   #5
 
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Well that's good to know the chrony is close!! Went to the range again today. I settled on a load of 14.2 grains of Unique. After looking my targets over closely I noticed that in the 14 grain range it was grouping nicely. So I went back and loaded 14.0 thru 14.8 in .2 grain increments. 14.2 grouped a little over an inch at 50 yards (with a bipod).
So back to the range I went with 3 different seating depths. 2.645 COL was right at the lands so I loaded 3 with that and 3 with 2.635 and 3 with 2.625. Right on the lands at 2.645 won out with a group of 3 at 1.666"! Now I'll adjust the peep sight.
With an average velocity of 1160 with a 405 grain lead bullet can anyone tell me the bullet drop at 100 yards with a 50 yard zero? My manuals don't have that low of a velocity.
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Old September 10th, 2019, 07:20 PM   #6
 
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Excellent, would be happy with that for sure. Thanks for posting. I think PEEPS are awesome....

Used an average of variables to forecast, including B.C. at .304 but would need chrono at target too, yet below should be close +/- to give a good idea.

So, 'estimate' is an approx. 5.8 to 6.3 inch drop at 100 yards.

Furthering the estimate, the drop would be twice that at 125 yards.

Then, approx. 17inch drop at 140yards (still maintaining about 950ft lbs, 1000fps), if looking for holdover estimate in terms of a decent sized, cornfed Whitetail. 😉

Only 12lbs recoil(approx). Very nice results!
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Old September 11th, 2019, 04:46 AM   #7
 
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Thanks for the info, about what I had in my head. Most of my hunting is up close, thus the 50 yard zero. I'm just thinking of how high I'd need to be at 50 to still cover something at 100. I was thinking that 2 or 3" high at 50 would be about right.
Once I get out to an outdoor range I'll know for sure how it prints at 100 yards.
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Old September 11th, 2019, 07:05 AM   #8
 
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Great work, and pretty flat trajectory still! Yeah, my current reduced loading for 403g FP w/ slightly rounded ogive is still at about 25-30lbs recoil. I also avoid long shots these days myself.

Heavy bullets can do real well, with a good stiff bbl and reasonable twist.

Another one that had good results with is 350g Hornady for shorter ranges, but that load was a thumper at both ends in too big of case, need to reduce that one as well. Need to pull apart some that no longer of interest. Plus use the my 4570 loads more!
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Old September 18th, 2019, 09:29 AM   #9
 
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I shoot that same caliber but a Uberti High Wall with a 30" barrel. I cast my own bullets then powder coat them then size them. Right now I`m using a RCBS 45-300-FN mold. They come out at 320g
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Old September 23rd, 2019, 07:06 PM   #10
 
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Back to the indoor range again today. I ended up putting a 1 X 4 mil dot scope on it. With a little fine tuning, got it shooting dead on at 50 yards. Then decided to see how high the 1st mil dot shoots at 50 yrds. About 5 5/8". Pretty close to what I expected. Good enough for close up deer hunting in Iowa!
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Old September 26th, 2019, 08:29 AM   #11
 
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MALLEN,
Before getting a mil dot scope, some years I would set scope crosshair to print at +5-6 inches high at 50 or occasionally 100 yards, not for 13-16 inch breasted deer but for 32-36 inch elk. This was at higher velocity, but similiar weight bullets as yours, for an extended range zero, which dont need now for max 250yrd shots.

Above load, on my software if I set crosshair to print at +5.6 inches high, at 50 yards using 1160fps, looks like my zero estimation would be at about 140 yards. The maximum ordinate of trajectory looks to be right around +6.5 to 7 inches high at 75 yards.

Also, on your handload, was curious about case fill material. Regarding my current project (same bullett) in bigger case at 60% fill, was thinking about holding powder over flash hole with dacron or recommended stuffing by IOWEGAN but have never tried that in bottle neck nor huge 140g h2o case. I wont get to straightwall 4570 handloads before Dec-January anyway but cant wait, was never really satisfied with most of my previous 4570 handloads, tho worked ok.
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Old November 18th, 2019, 08:39 AM   #12
 
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Quote:
Originally Posted by Mallen View Post
Back to the indoor range again today. I ended up putting a 1 X 4 mil dot scope on it. With a little fine tuning, got it shooting dead on at 50 yards. Then decided to see how high the 1st mil dot shoots at 50 yrds. About 5 5/8". Pretty close to what I expected. Good enough for close up deer hunting in Iowa!
Have you spotted any of those 'crop grazed' Iowa WhiteTails yet? Am envious, as used to to hunt them alot in Texas panhandle, pines & hill country - what wonderful table fare. Even the older deer did well making their rounds, once harvested a 15 yr old and it tasted like veal.

You see, in the mountains, we have to soak meat in milk for a night or two before marinate .... then its good.

I probably wont be able to try your handload till winter plus current range could be out to my 'recent years' max, at 250yards but prefer much less. Yet those 405g'rs have a really nice B.C. plus they leave 2 big holes, even at milder 'but fun' velocity.
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Old November 18th, 2019, 09:53 AM   #13
 
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Quote:
Originally Posted by Mallen View Post
Today I made it to the range with a handful of reloads using Unique and 405 grain Missouri Bullet Co. lead coated bullets and my 45/70. I was also carrying one of those new MagnetoSpeed Sporter chronographs. It's pretty handy in an indoor range!
I chronographed 13 through 16.5 grains of Unique (in .5 grain increments) through my Thompson Center Encore. When I hit 15.5 grains and 1,200 fps it printed nicely and had an ES in 3 shots of 2 fps. I may have found the sweet spot! Now for some fine tuning.
Awesome !
People can Bad Mouth Unique all they want , results like yours just prove it is still one of the most useful powders with cast bullets .
Let us know how the fine tuning goes .
Gary
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