Vx3i 4.5-14x50mm with cds turret tops out at about 450 yards. Turret gets tight. Shooting 300 win mag zeroed at 200 yards 180 grain boat tail loads. Am I maxing out my adjustment with the 1" tube?

2550-2600 is reasonable

Is it denting the projectile or the cartridge case?


Look for burrs or sharp edges in the magazine or on the ejector. Work the action slowly with dummy rounds so you can see the cartridge moving through your rifle's action - also look at the chamber mouth to see if there is a shard of metal here where it shouldn't be.

Remove one round from the magazine and try it again. If it is still not retaining the mag, then you have a problem with the magazine catch. Also try a different magazine as there could be a problem with the mag catch notch in the magazine. In any case this is not a user repairable item. Take this to your local gunsmith or back to the dealer you purchased it from.

No, not when it comes to Norinco magazines for pistols, at least.

The single stack version holds up to eight rounds and the double stack version holds up to 16 rounds.

There are other 9mm magazines (AR-15), however, that can hold up to 32 rounds. Here are some of them: https://www.cheaperthandirt.com/category/parts-and-accessories/magazines/ar-15-magazines/9mm-mags.do

Try Hornady with the VLD bullet.

This depends on the rifle and the ammo combination. I'd try Hornady with VLD or ELD bullets.

1:7 would be ideal,but your rifle may shoot this ammo very well.you will just have to try it out.bullet placement is critical with a small caliber,but,300 yards should be ok,if you put where it needs to be

Hi,
What is the type of choke you are using? You want a FULL choke for the tightest pattern. Then you need to "pattern" your shotgun. Put a large piece of cardboard (4' x 4') on a range backstop at 20 yards and place a highly visible 3 inch orange dot or simply draw a 3 inch letter x in the middle of the cardboard. Take a string, 36 inches long and staple it to the center of the dot or X then tie a pencil on the other end. Stretch the string out and draw a perfect circle on the cardboard 36 inches from the center, then remove the string and pencil. From a shooting bench, use a shooting rest to steady your aim. Shoot at the center dot or X by pointing the shotguns bead sight directly at the dot or x
Look at the pattern of holes the shot pellets made. If they are mostly centered within the 36 inch circle, your hold would be right on the target. If they would, say, be up from center, the hold would be below the target. Up and to the right, the hold would be down and to the left, etc.
A gunsmith can correct this and make the gun shoot so that your hold would be on the target instead of trying to compensate for the barrel characteristics of your shotgun.

What exact bullet? Hornady makes a lot of .270 boat tailed bullets, many 145 grains weight.

Can't say without knowing the weight of the bullet.
You can see data for many calibers listed at the Hodgdon web site.
Go to http://www.hodgdonreloading.com/