Max load/pressure in CVA Scout V2 45-70 conversion

I’m no expert, but I believe from other posts I have read here that is to heavy of a bullet

Okay, I have a follow up on this question but please add to this string if you have more information..... I just called Underwood Ammo company and asked about this specific ammo: 45-70 Government +P 325 gr Xtreme hunter for use in a CVA Scout V2. The lady I chatted with first told me it was fine for the Scout, but just to be sure she took a few minutes to talk to someone else. What she was told is that the test gun they use for this very load is in fact a CVA Scout V2. The pressure of this ammo she was told generated 45K PSI and it was safe for the Scout. She said that their test gun had thousands of rounds through it.

Just my two cents here................If I were playing with these skinny barreled break action conversions, I would stick with saboted 195/200 gr. bullets with mild loads. These are mainly short range "woods" guns. You don't need 300+ grain bullets to kill a deer at moderate ranges. Just remember, your hand is right under the point where these barrels will "give way". The idea of having 1.250" or more steel above your hand is a lot more reassuring than that 1" (who knows at what pressure it will let go" !!! And......just double charge it and you have a real disaster. I have personally bulged three SML barrels. All Brux and all with 1.250" for the first six inches. None ever ruptured. Over the course of more than 20,000 shots!! Be safe! I don't know of anyone doing pressure traces on these skinny barrels!

I was away from my computer after my last post yesterday but did fire 8 rounds of that Underwood 325 +P ammo through the 45-70 Scout. The recoil was significant but not punishing IMO, a bit stronger than my converted Scout with 65 grains of 4198 pushing a tight fitting Parker BE. Both have muzzle breaks and would be less fun without them I'm sure.

Point well taken Richard!

I've been searching for some Barnes expander saboted 195's with no luck so far. My plan is to shoot copper from my conversion for deer hunting next year. Currently I have some Barnes 250 T-EZ's that I need to knurl with coarse files to get them to fit the bore and the fit ends up being an easy one hand push, if not easier. Without the knurl, they fall down the bore. I'm using wool wads beneath them. Yesterday I shot a few using 60 grains of 4198 and the accuracy was acceptable for deer hunting and just as good as the 65 grain loads I had tried earlier. I plan to fine tune the load going backwards a bit and see how they group. Here in the Wisconsin woods where I hunt the shots I get are almost always less than 200 yards and mostly less than 100.

I have shot deer for 49 years with nothing that equals the power of these Scouts. The smallest bullet was 90 gr HPBT out of a .250 Savage and the biggest was a 200 gr Core Lokt out of a .35 Rem. Many calibers in between. The results on present deer(small by early years deer/Maine) is almost over kill. It was overkill with Kyles 253HC with 65 gr of I4198 at up to 130 yds.
Last years load of 56 gr./I4198, wool wad, and .45/250 gr. Hornady SST was about perfect. Same ranges. I am still going to try lighter bullets and sabots this year but I know I can use last years load if I need to. Very versatile gun I call it. Can be loaded up and down for desired results.
The Barnes seem unobtainium right now so I decided to get some Lehigh 195 gr. all copper bullets. Still looking for a place to shoot them.

You will need to anneal those Lehigh bullets. They will drill your sabots and fly sideways.

This will happen from 50 to 65 grains of 4198. That is the range I tested. After annealing I had no problems at all and had them up to 2700fps and down to 2500fps using a duplex load of N110/4198 which is worse in terms of pressure than straight 4198. Accuracy was excellent at all speeds so I settled on 2600fps to give me temp room in both directions. The came out to 10 grains of N110 and 47 grains of IMR 4198.

Terminal performance on a Doe at 120yds this year was the best I have seen from any bullet in ANY of my firearms!

I fail to see how annealing a copper bullet would have any effect on drilling a sabot? The annealing would relate more to what happens to the bullet upon impact not what it's doing in the barrel. I would suggest just knurling the bullet so that it grabs the Sabot.

Ok, so the last 2 comments are just knurl a .40 cal and put it in a HLBS and fire away......