BDC bullet drop compensating

unfortunately Nikon got out of the firearms optics business at the end of 2019 anything still for sale is new old stock as I understand it

I replaced the Anderson trigger spring and hammer spring with a JP spring kit and that made it a nice consistent and smooth trigger for about $11. I'm really liking the 300 blackout and planning on putting a couple of magazines through it here soon at various distances, both with subsonic and supersonic.

I also ordered a Palmetto stripped lower and a Spike's LPK to slowly start my next build, which I am going to do in .223 wylde.

Stay away from the jp spring kits, Ive tried both the yellow and red versions. Both eventually turned into random light primer strikes.

Hmmm, I've never heard that from anyone about them

I use the yellow springs and have had them in one rifle for 3 years now and as it is my 223 plinking tool I have no idea how many rounds it has through it but it is a lot. Using Br4 CCI 400 Remington 7 1/2 primers and some other I can't think of off the top of my head at the moment and have no problems with light strikes.

What ammunition were you using when this happened to you Possum Man ??

Never ever had an issue with them.

CCI #41 primers. Which are mil spec and have a hard primer cup so you dont get slam fires ( i know not likely) from any free floating firing pins like an AR. I also run my rifles suppressed which will get a bit of carbon all the way down into the trigger assy. What i found was if i didnt clean in between every time i fired it and the rifle sat for a day or two the first round would go snap. I could clear that round and then it would fire no problem until i let it sit for a while again between shots, then goes snap on the first round. You could rechamber that same round and it would fire and you could just see the firing pin just didnt hit hard enough when inspecting that round. I believe the culprit is the extra carbon the suppressor puts into the system, once it sits in the BCG or trigger group it kind of mucks up the works especially in humid climates like in the south. That is also not a lot of rounds to cause this...just one or two shots is enough.
I was doing some load workups on a buddies 458 and he had the jp springs in and we started getting a whole lot of light strikes. We swapped out the springs back to the regular ones and the problem went away. Again those are magnum pistol primers in 458 but i dont know the specs on those primer cups.
I also tried to make the springs work by bobbing the hammer on one trigger group. It lightens the hammer so it has more velocity when hitting the primer from the underpowered springs, which is exactly what the jp trigger groups are that they used to sell with their spring kits in them. I do believe they even had a disclaimer on their site to not use those spring kits in anything but competition or target guns, not to use them for duty or home protection.

While the jp springs do work most of the time and will do a good job of lightening a milspec trigger I would never use them in any gun I might even have a chance at needing to defend myself or even hunt with. Your mileage may vary, but they are not for me. I would advise spending the money on a better trigger that is designed to be lighter pull. I have not had any problems with the RRA national match triggers, I even run the varmint version which is even lighter.

i had an issue using the JP spring with a 22lr bcg adapter

it was not consistent hitting hard enough to set off the 22lr a switch to mill spec trigger group and it was running very reliable

You could always just put the red spring on the hammer and leave the yellow on the trigger if you had an issue.

Tried the red springs too. They are still not full power springs.

I run Winchester Large magnum pistol primers in my 458 with no issues using JP springs and thats my truck gun or sits on the 4 wheeler so its not exactly a safe queen or septs that clean. I do run all of them pretty "wet" with a good squirt of ballistic after cleaning .

Lots of people I know hunt with guns like this and never heard of a problem. I have not seen a problem with FMJ military stuff either. Could it be a friction problem with the hammer dragging. Got me, I like the lighter trigger pull.

60 rounds through it today at the house both sub and super. 100 rounds tomorrow at the range.

Looks good!

what stock is that and can you get 14 1/2 inches LOP?

It's from Advanced Tactical. Yes you can get to over 15"

Decided my 300blk rifle was lonely so built her a little brother, a 300blk pistol. This one will eventually get a suppressor and be the home defense gun. This is a really fun caliber to shoot, although my next build is headed towards a 6.5 grendel.

You are latest case of BRD-19...........Black Rifle Disease. There is no cure but it is rarely deadly. You might be able to kick it with counseling.

Why in the heck would I want to kick it? I mean, who needs to pay bills or things like that when you can build rifles?