ORIGINAL: Paul L Mohr
The problems you are seeing could be numerous. One thing I see right off the bat is you are not shooting a group before adjusting the scope. It sounds like you are shooting one shot, then adjusting and firing another. You should fire at least two or three shots before you adjust anything. I know that gets expensive with modern sabots though.
I understand what you are saying. However I only made two adjustments yesterday. I fired one round at 25 yards, made an elevation adjustment, fired one more round then moved on to 100 yards. I fired my first round at 100 yards and then made elevation and windage adjustments. I then fired 9 more rounds at 100 without making anymore adjustments. My groups didn't get any better. [/align]
ORIGINAL: Paul L Mohr
And like mentioned above most rifled slug barrels have a 1 and 30 something twist to them and don't seem to like the faster rounds. Try some ammo that shoots closer to 1700 fps and see what happens. Another thing is slug guns can be very picky about what they like, you just have to try several brands and types to see what works best. And shooting relatively well up close and going to hell in a hand basket at 100 yards or farther is fairly common as well. This is why you should ALWAYS shoot your gun at the ranges you intend to hunt game at.
I have an H&R ultra that will do the same thing with some loads. Shoots great at 50 yards with just about anything I feed it, and most are pretty darn good at 75 yards. Then some of them won't even stay on a 8x11 sheet of paper at 100 yards! Mine simply does not like the faster Barnes bullets by federal.
The fact that it shot better when it was cold is a bit puzzling and that would lead me to believe you had the nut too tight or something else is going on.
Could be a scope failure as well, I have dealt with that recently and it's enough to give you fits.
If you don't figure it out let me know, I know a site that deals specifically with slug shooting with some very knowledgeable people that may be able to help you out.
Paul
Remington's uses a 1:24 twist on their 20 ga.according to their web site. I have no idea if 1:24 is fast or slowfor a 20 ga.
I already backed the barrel/mag. nut off and tightened ithand tight. I'm going to try the slower Lightfield Slugs. I'm going to sightit in 2 inches high at 50 yards like their web site says. That is supposed to be right around zero at 100 yards.
I need a legitimate 100 yardslug gun. To me that means 3 inch groups or better at 100 yards.Although most of my hunting will be in the wood where 50 to 75 yard shots are the norm. I will also be hunting areasonce ina while where 100 plus yards shotmight be required. I'll set myself up so I won'tbe taking shots longer then 100 yards. I'll take all the information and web sites you have to offer. Thanks!