Bogle was playing Non League last year, has only had 6 months in League Two (which is a poor league) and has played 1 and a half games for his new Club in the Championship.
Hence why I said if he continues until the end of the season then a 78/80 wouldn't go a miss, You can't give him a Championship rating after only 113 mins of Football in that league.
+8 would be too big of a jump in one hit.
Akinde is a good example to use aswell he has also scored 19 League Two goals this season and scored 23 League Two goals last season and 31 goals in the Non League the season before that, yet he is only rated at 73.
The difference between the two strikers is minimal and it doesn't represent a 5 point gap in ratings.
Akinde was also linked to the Championship in January and I have no doubts that he will follow Bogle there at the end of the season.